SUBJECT INDEX
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
c
Calculator
24 hour time calculator Math / scientific calculator instructions Area of a polygon calculator Angle calculator for angles expressed in Degrees, Minutes, Seconds Graphical Function Explorer grapher (GFE) 24 hour difference between two times calculator Math / scientific calculator similar to those from TI, Casio, HP etc
Calculus
Calculus - Second Fundamental Theorem of Calculus Calculus - Fundamental Theorem of Calculus
Capture
Capturing parts of the screen as an image
Cardinal
Cardinal numbers (Whole numbers or natural numbers) Cardinality of a set of numbers
Cardinality
Cardinality of a set of numbers
Center
Finding the center of a circle or arc with compass and straightedge or ruler Center Points of concurrency Center of a Polygon Finding the center of a circle with any right-angled object
Central angle
Central Angle of a Polygon Central angle of a circle Central-angle Central Angle Theorem
Centroid
Median of a triangle - math word definition Euler line How to construct the centroid of a triangle with compass and straightedge or ruler Centroid Triangle Centers Overview Triangle centroid definition Coordinates of a triangle centroid with calculator (Coordinate Geometry)
Chain rule
Calculus - Chain Rule
Chart
Save GFE chart as a link
Chord
Chord - Math word definition Parts of a circle - Pictorial index Intersecting Chord Theorem
Circle
How to construct a tangent to a circle at a point Concentric - Math word definition Circle and ellipse drawing algorithm How to construct (draw) the two external tangents to two given circles Radius of a circle definition and calculator Area of a circle segment with calculator- Math Open Reference Segment of a Circle Intersecting Secant Theorem How to construct a circle through the 3 vertices of a triangle with compass and straightedge or ruler Area and height of a circle segment with calculator- Math Open Reference Finding the center of a circle with any right-angled object Basic Equation of a Circle Parametric Equation of a Circle Diameter of a circle definition and calculator- Math Open Reference Conic section - circle How to construct (draw) the two internal tangents to two given circles Finding the center of a circle or arc with compass and straightedge or ruler General form of Equation of a Circle How to construct (draw) tangents to a circle through an external point Semicircle - math word definition Chord - Math word definition Angle inscribed in a semicircle Intersecting Chord Theorem Area enclosed by a circle with calculator Central angle of a circle Derivation of the formula for the area of a circle Square inscribed in a circle Tangent to a circle definition Area of an annulus Annulus - Math word definition Arc - Math word definition Sector definition Thales theorem Area of a sector of a circle Incircle of a triangle Circle definition with calculator Inscribed angle of a circle How to construct a circle through 3 points with compass and straightedge or ruler Circumference (perimeter) of a circle with calculator Derivation of the formula for the circumference of a circle Secant of a circle definition Circumcircle
Circumcenter
How to construct circumcenter of a triangle with compass and straightedge or ruler Triangle Centers Overview Circumcircle of a Triangle Triangle Circumcenter definition Circumcenter Euler line
Circumcircle
How to construct a circle through 3 points with compass and straightedge or ruler How to construct a circle through the 3 vertices of a triangle with compass and straightedge or ruler Circumcircle of a Triangle Circumcircle Radius of a Regular Polygon Circumcircle of a Regular Polygon
Circumference
Circumference (perimeter) of a circle with calculator Derivation of the formula for the circumference of a circle Parts of a circle - Pictorial index Perimeter of an Ellipse
Circumradius
Circumradius Radius of a Regular Polygon Circumcircle of a Triangle
Circumscribed
How to construct a circle through 3 points with compass and straightedge or ruler Circumcircle of a Regular Polygon Circumcircle of a Triangle How to construct a circle through the 3 vertices of a triangle with compass and straightedge or ruler Circumscribed rectangle, bounding box. (Coordinate Geometry) Circumcircle Circumscribed
Cite
How advertising on the site works How to cite Math Open Reference articles
Classification
Classification Classification of triangles
Classify
Classify Classification of triangles
Collinear
Collinear - Math word definition
Common core
Common Core alignment
Comparison
Calculus - Comparison Test
Compass
Construction List of construction worksheets Compass Constructions Introduction. Drawing shapes with compasses and straightedge
Complement
Complement
Complementary
Complementary Angles definition Complementary Complementary angle using compass and straightedge or ruler
Complex number
Complex numbers - animated definition Real-number Number The letter j - math word definition Imaginary-number The letter i - math word definition
Composite number
Prime number - math word definition Composite number - math word definition Number
Composition
Calculus - Chain Rule
Concave
Concave Polygon Definition Concave
Concentric
Concentric - Math word definition
Concurrent lines
Concurrent-lines Orthocenter of a triangle - math word definition Triangle incenter, description and properties Triangle Circumcenter definition Triangle centroid definition Points of concurrency
Cone
Volume of a right cone Slant height of a right cone Surface area of a right cone Cone - Math word definition Derivation of the formula for the area of a cone Oblique versus right cone - Math Open Reference Conic section - ellipse Comparison of a cone and pyramid Conic section - circle
Congruent
HL Congruent Triangles Congruent Lines Definition Reflected Congruent Triangles Congruent triangles with a common side Rotated Congruent Triangles ASA Congruent Triangles Congruent Polygons- Math Open Reference Congruent AAA Doesn't work AAS Congruent Triangles Congruent Triangles Congruent Angles Congruent Polygon Tests- Math Open Reference SAS Congruent Triangles SSA doesn't work SSS Congruent Triangles
Conic section
Conic section - ellipse Conic section - circle
Conical
Conical Comparison of a cone and pyramid Cone - Math word definition
Construction
Printable instructions for finding the incenter of a triangle with compass and straightedge or ruler Printable instructions for constructing a hexagon given one side. Printable instructions for copying a line segment with compass and straightedge or ruler Printable instructions for constructing the complementary angle to a given angle with compass and straightedge or ruler Printable instructions for drawing the circumcircle of a triangle with compass and straightedge or ruler Printable instructions for copying a triangle with compass and straightedge or ruler Printable instructions for copying an angle with compass and straightedge or ruler Printable step-by-step instructions for constructing the difference of two angles with compass and straightedge or ruler Printable instructions for drawing an equilateral triangle with compass and straightedge or ruler Printable instructions for drawing an ellipse with string and pins Printable instructions for finding the circumcenter of a triangle with compass and straightedge or ruler Printable instructions for drawing an angle with a protractor Printable step-by-step instructions for constructing a segment which is the difference of two given segments with compass and straightedge or ruler Printable instructions for dividing a line segment into equal parts with compass and straightedge or ruler Printable instructions for finding the foci of an ellipse with compass and straightedge or ruler Printable instructions for finding the centroid of a triangle with compass and straightedge or ruler Printable step-by-step instructions for constructing a segment which is the sum of given segments with compass and straightedge or ruler Printable instructions for finding the altitude of an acute triangle with compass and straightedge or ruler Printable instructions for finding the altitude of an obtuse triangle with compass and straightedge or ruler Printable step-by-step instructions for adding two angles with compass and straightedge or ruler How to construct an equilateral triangle inscribed in a given circle with compass and straightedge or ruler How to construct the centroid of a triangle with compass and straightedge or ruler Printable instructions for drawing a 30-60-90 triangle with compass and straightedge or ruler Constructing a circle through 3 given points How to construct circumcenter of a triangle with compass and straightedge or ruler Printable instructions for drawing a 30 degree angle with compass and straightedge or ruler Printable instructions for bisecting a line with compass and straightedge or ruler Finding the center of a circle or arc with compass and straightedge or ruler Printable instructions for finding the center of a circle with compass and straightedge or ruler Printable instructions for bisecting an angle with compass and straightedge or ruler Printable instructions for drawing a 90 degree angle with compass and straightedge or ruler Printable instructions for drawing the incircle of a triangle with compass and straightedge or ruler Printable instructions for drawing a 45 degree angle with compass and straightedge or ruler Printable instructions for drawing a 60 degree angle with compass and straightedge or ruler Printable instructions for finding the center of a circle with any right angled object Printable instructions for measuring an angle using a protractor Printable strp-by-step instructions for drawing a triangle given three sides with compass and straightedge or ruler How to bisect a segment with compass and straightedge or ruler How to bisect an angle with compass and straightedge or ruler Constructing 75, 105, 120, 135, 150 degree angles and more Printable instructions for drawing a triangle given two sides and included angle with compass and straightedge or ruler Printable instructions for constructing a right triangle with given leg lengths with compass and straightedge or ruler Printable step-by-step instructions for drawing a triangle given two angles and included side with compass and straightedge or ruler Printable instructions for constructing a right triangle with given angle and hypotenuse with compass and straightedge or ruler Printable instructions for constructing a right triangle with given leg and hypotenuse with compass and straightedge or ruler Printable instructions for constructing a right triangle with given angle and one leg (LA) with compass and straightedge or ruler How to construct a 90 degree angle with compass and straightedge or ruler How to construct a 60 degree angle with compass and straightedge or ruler How to add two angles with compass and straightedge or ruler How to construct a circle through 3 points with compass and straightedge or ruler How to construct a 30-60-90 triangle with compass and straightedge or ruler List of construction worksheets Sum of line segments using compass and straightedge or ruler How to construct (draw) one of the three altitudes of a triangle How to construct (draw) a 45 degree angle with compass and straightedge or ruler How to construct a 30 degree angle with compass and straightedge or ruler How to construct (draw) one of the three altitudes of an obtuse triangle Printable step-by-step instructions for constructing a triangle given two angles and non-included side (AAS) with compass and straightedge or ruler Printable instructions for constructing one of the two internal tangents to two given circles. Printable instructions for constructing an isosceles triangle given a side and apex angle Printable instructions for drawing the medians of a triangle with compass and straightedge or ruler Printable instructions for finding the midsegment of a triangle with compass and straightedge or ruler Printable instructions for finding the orthocenter of a triangle with compass and straightedge or ruler Printable step-by-step instructions for drawing an isosceles triangle with compass and straightedge or ruler - II Printable step-by-step instructions for drawing an isosceles triangle with compass and straightedge or ruler Printable instructions for constructing a hexagon inscribed in a given circle. Printable instructions for constructing a pentagon inscribed in a given circle. Printable instructions for constructing a square inscribed in a circle with compass and straightedge or ruler Printable instructions for drawing parallel through a point with compass and straightedge or ruler Printable instructions for drawing parallel through a point (rhombus method) Printable instructions for constructing the supplementary angle to a given angle with compass and straightedge or ruler Printable instructions for drawing a tangent at a point on a circle with compass and straightedge or ruler Printable instructions for drawing tangents to a circle from a point with compass and straightedge or ruler Printable instructions for constructing tangents to two given circles. Printable instructions for constructing a square of a given side length with compass and straightedge or ruler Printable instructions for drawing a perpendicular at a point on a line with compass and straightedge or ruler Printable instructions for drawing parallel through a point with compass and straightedge Printable instructions for drawing a perpendicular at the end of a ray with compass and straightedge or ruler Printable instructions for drawing a perpendicular to a line through a point with compass and straightedge or ruler Printable instructions for constructing an equilateral triangle inscribed in a given circle. Finding the center of a circle with any right-angled object How to construct (draw) tangents to a circle through an external point How to construct (draw) the two external tangents to two given circles How to construct (draw) the two internal tangents to two given circles How to construct a tangent to a circle at a point Supplementary angle using compass and straightedge or ruler How to construct the incenter of a triangle with compass and straightedge How to construct (draw) a square How to construct a triangle given two angles and a non-included side How to construct a triangle given two angles and the included side How to construct a triangle given two sides and the included angle How to construct (draw) a triangle given three sides How to construct (draw) an equilateral triangle with compass and straightedge or ruler How to construct (draw) a right triangle with two given leg lengths (LL) How to construct (draw) a right triangle with a given one angle and one leg (LA) How to construct (draw) a right triangle with a given one angle and hypotenuse (HA) How to construct (draw) a right triangle with a given leg and hypotenuse (HL) Constructions Introduction. Drawing shapes with compasses and straightedge How to construct (draw) the incircle of a triangle with compass and straightedge or ruler How to construct (draw) an isosceles triangle given base and altitude with compass and straightedge or ruler Construct an isosceles triangle with given leg and apex angle with compass and straightedge or ruler How to construct (draw) the medians of a triangle How to construct an isosceles triangle given base and one side How to construct a square inscribed in a circle with compass and straightedge or ruler How to construct a regular hexagon inscribed in a circle with compass and straightedge or ruler Constructing a regular pentagon inscribed in a circle How to construct midsegment of a triangle with compass and straightedge or ruler How to construct (draw) the orthocenter of a triangle- Math Open Reference How to construct (draw) a perpendicular from a line through a point How to construct (draw) a perpendicular at a point on a line Construction How to construct (draw) a perpendicular at the end of a ray with compass and straightedge or ruler How to construct a parallel through a point (translated triangle method) with compass and straightedge or ruler How to construct a parallel through a point with compass and straightedge or ruler How to construct (draw) a parallel through a point with compass and straightedge or ruler (rhombus method) Finding the foci an ellipse How to construct a regular hexagon given one side with compass and straightedge or ruler How to copy an angle with compass and straightedge or ruler Copying a triangle with compass and straightedge or ruler Copying a line segment with compass and straightedge or ruler Complementary angle using compass and straightedge or ruler Difference of two line segments using compass and straightedge or ruler Difference of two angles using compass and straightedge or ruler How to construct (draw) an ellipse How to construct a circle through the 3 vertices of a triangle with compass and straightedge or ruler Dividing a line segment into N equal parts with compass and straightedge or ruler
Constructions
Teaching Geometric Constructions using Math Open Reference
Contents
Table of Contents
Continuity
Calculus - Informal continuity Calculus - Formal approach to continuity
Continuous
Calculus - making a function continuous and differentiable
Convergence
Calculus - Ratio Test
Convex
Convex Convex Polygon Definition
Coordinate
Basic Equation of a Circle
Coordinates
Equation of a line - slope and intercept form. (Coordinate Geometry) Coordinates Print blank graph paper Distance between points Equation of a line - point - slope form. (Coordinate Geometry) Area of any polygon (Coordinate Geometry) Coordinates of a regular polygon Coordinates of a point Ray definition (Coordinate Geometry) Intercept (b) of a line (Coordinate Geometry) Origin - math word definition Slope (m) of a line (Coordinate Geometry) The Coordinate Plane Line Segment definition (Coordinate Geometry) Introduction to Lines in Coordinate Geometry Line definition (Coordinate Geometry) Introduction to Coordinate Geometry Midpoint Theorem (Coordinate Geometry) Teaching Notes: Limitations of the applets in the coordinate geometry section
Coplanar
Coplanar - Math word definition Introduction to plane geometry
Corresponding
Corresponding Corresponding Angles definition
Cos
Cosine - math word definition COS - Math word definition The trigonometry arccos() function - inverse cosine - math word definition Graph of the Cosine function - Trigonometry Trigonometry Overview
Cosecant
Introduction to the 6 trigonometry functions Cosecant Calculus - trigonometric Functions
Cosine
SOHCAHTOA - math word definition - Trigonometry Calculus - trigonometric Functions The trigonometry arccos() function - inverse cosine - math word definition Proof of the Law of Cosines Cosine - math word definition The Law of Cosines Graph of the Cosine function - Trigonometry Solving Triangles Introduction to the 6 trigonometry functions
Cot
COT - Math word definition Cotangent
Cotangent
Calculus - trigonometric Functions Cotangent Introduction to the 6 trigonometry functions
Coterminal
Coterminal - math word definition
Counting number
Counting numbers (Whole numbers or natural numbers) Number Natural number - math word definition Cardinal numbers (Whole numbers or natural numbers) Whole number - math word definition
Cpctc
Cpctc
Csc
CSC - Math word definition Cosecant
Cube
Surface area of a cube with calculator Volume of a cube with calculator Platonic solid Cube definition with calculator
Cubic
Cubic curve and graph display Cubic
Curve
Calculus - Curve analysis - special cases Calculus - Curve Analysis - Global Extrema Calculus - Basic curve analysis
Cyclic
Inscribed (cyclic) quadrilateral Interior angles of an inscribed quadrilateral Diagonals of an inscribed quadrilateral Area of an inscribed quadrilateral
Cylinder
Surface area of a cylinder with calculator Derivation of the surface area of a cylinder Cylinder definition and properties Cylinder as the locus of a line Relation of a cylinder to a prism Volume of a cylinder segment with calculator Volume of a cylinder with calculator Oblique cylinder