Math / scientific calculator instructions Angle calculator for angles expressed in Degrees, Minutes, Seconds Math / scientific calculator similar to those from TI, Casio, HP etc 24 hour time calculator 24 hour difference between two times calculator Graphical Function Explorer grapher (GFE) Area of a polygon calculator Coordinates of the vertices of a regular polygon with calculator Incenter coordinates of a triangle with calculator (Coordinate Geometry) Angle calculator for angles as used in the Nautical Almanac Calculus - Second Fundamental Theorem of Calculus Calculus - Fundamental Theorem of Calculus Capturing parts of the screen as an image Cardinality of a set of numbers Cardinal numbers (Whole numbers or natural numbers) Cardinality of a set of numbers Introduction to Coordinate Geometry and the Cartesian Plane Triangle Centers Overview Finding the center of a circle or arc with compass and straightedge or ruler Center Finding the center of a circle with any right-angled object Midpoint - math word definition Points of concurrency Center of a Polygon Central-angle Central angle of a circle Central Angle Theorem Central Angle of a Polygon Median of a triangle - math word definition Centroid Triangle Centers Overview How to construct the centroid of a triangle with compass and straightedge or ruler Triangle centroid definition Euler line Coordinates of a triangle centroid with calculator (Coordinate Geometry) Calculus - Chain Rule Save GFE chart as a link Chord - Math word definition Intersecting Chord Theorem Parts of a circle - Pictorial index How to construct a tangent to a circle at a point Diameter of a circle definition and calculator- Math Open Reference How to construct a square inscribed in a circle with compass and straightedge or ruler Conic section - circle How to construct a regular hexagon inscribed in a circle with compass and straightedge or ruler General form of Equation of a Circle Parts of a circle - Pictorial index Circle and ellipse drawing algorithm How to construct (draw) tangents to a circle through an external point How to construct (draw) the two external tangents to two given circles Constructing a regular pentagon inscribed in a circle Parametric Equation of a Circle Semicircle - math word definition How to construct a circle through 3 points 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 (draw) the incircle of a triangle with compass and straightedge or ruler Thales theorem Area and height of a circle segment with calculator- Math Open Reference Tangent to a circle definition Square inscribed in a circle Finding the center of a circle or arc with compass and straightedge or ruler Concentric - Math word definition Radius of a circle definition and calculator Intersecting Secant Theorem Finding the center of a circle with any right-angled object Area of a circle segment with calculator- Math Open Reference How to construct a circle through the 3 vertices of a triangle with compass and straightedge or ruler Angle inscribed in a semicircle Tangent to a circle definition How to construct (draw) the two internal tangents to two given circles Central angle of a circle Derivation of the formula for the circumference of a circle Chord - Math word definition Intersecting Chord Theorem Circle definition with calculator Area enclosed by a circle with calculator Derivation of the formula for the area of a circle Incircle of a triangle Inscribed angle of a circle Secant of a circle definition Segment of a Circle Circumcircle Unit-circle Circumference (perimeter) of a circle with calculator Sector definition Annulus - Math word definition Area of an annulus Arc - Math word definition Basic Equation of a Circle Area of a sector of a circle Euler line Circumcenter Triangle Centers Overview Circumcircle of a Triangle How to construct circumcenter of a triangle with compass and straightedge or ruler Triangle Circumcenter definition Circumcircle Radius of a Regular Polygon How to construct a circle through 3 points with compass and straightedge or ruler Circumcircle of a Regular Polygon How to construct a circle through the 3 vertices of a triangle with compass and straightedge or ruler Circumcircle of a Triangle Perimeter of a kite Circumference (perimeter) of a circle with calculator Perimeter of a rectangle with calculator- Math Open Reference Perimeter of an Ellipse Derivation of the formula for the circumference of a circle Perimeter of a triangle Parts of a circle - Pictorial index Circumcircle of a Triangle Radius of a Regular Polygon Circumradius How to construct a circle through the 3 vertices of a triangle with compass and straightedge or ruler Circumcircle of a Regular Polygon Circumscribed rectangle, bounding box. (Coordinate Geometry) How to construct a circle through 3 points with compass and straightedge or ruler Circumscribed Circumcircle of a Triangle Circumcircle How to cite Math Open Reference articles How to cite Math Open Reference articles How to cite Math Open Reference articles 24 hour time calculator Classification Classify Classification of triangles Collinear - Math word definition Common Core alignment Calculus - Comparison Test List of constructions and construction worksheets Construction Constructions Introduction. Drawing shapes with compasses and straightedge Compass Complementary Angles definition Complementary angle using compass and straightedge or ruler Complement Complementary Complex numbers - animated definition The letter i - math word definition Number Real-number The letter j - math word definition Imaginary-number Number Composite number - math word definition Prime number - math word definition Calculus - Chain Rule Concave Concave Polygon Definition Concentric - Math word definition Triangle Circumcenter definition Concurrent-lines Triangle incenter, description and properties Triangle centroid definition Points of concurrency Orthocenter of a triangle - math word definition Volume of a right cone Slant height of a right cone Comparison of a cone and pyramid Oblique versus right cone - Math Open Reference Derivation of the formula for the area of a cone Surface area of a right cone Conic section - circle Cone - Math word definition Conic section - ellipse Rotated Congruent Triangles Dividing a line segment into N equal parts with compass and straightedge or ruler Copying a triangle with compass and straightedge or ruler Perpendicular bisector definition Congruent AAA Doesn't work AAS Congruent Triangles Congruent Angles ASA Congruent Triangles HL Congruent Triangles Congruent Lines Definition Congruent Polygons- Math Open Reference Congruent Polygon Tests- Math Open Reference SAS Congruent Triangles SSA doesn't work SSS Congruent Triangles Congruent Triangles Congruent triangles with a common side Reflected Congruent Triangles How to copy an angle with compass and straightedge or ruler Copying a line segment with compass and straightedge or ruler Conic section - circle Conic section - ellipse Calculus - Constant multiples of functions How to construct a triangle given two sides and the included angle (SAS) Teaching Geometric Constructions using Math Open Reference List of constructions and construction worksheets How to construct (draw) a triangle given three sides (SSS) How to construct (draw) the two internal tangents to two given circles How to construct (draw) a right triangle with two given leg lengths (LL) How to construct a square inscribed in a circle with compass and straightedge or ruler How to construct (draw) an ellipse Finding the foci an ellipse How to construct (draw) an equilateral triangle with compass and straightedge or ruler How to construct a regular hexagon given one side with compass and straightedge or ruler How to construct the incenter of a triangle with compass and straightedge How to construct (draw) the incircle of a triangle 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 a regular hexagon inscribed in a circle with compass and straightedge or ruler Constructing a regular pentagon inscribed in a circle How to construct an isosceles triangle given base and one side Dividing a line segment into N equal parts 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 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 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) How to construct a parallel through a point (translated triangle method) with compass and straightedge or ruler How to construct (draw) a perpendicular at the end of a ray with compass and straightedge or ruler How to construct (draw) a perpendicular from a line through an external point How to use a protractor to draw an angle Difference of two line segments using compass and straightedge or ruler Construction Constructing 75, 105, 120, 135, 150 degree angles and more How to construct a 30-60-90 triangle with compass and straightedge or ruler How to construct a circle through 3 points with compass and straightedge or ruler How to add two angles with compass and straightedge or ruler 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) one of the three altitudes of an obtuse triangle How to construct a 30 degree angle with compass and straightedge or ruler How to construct (draw) a 45 degree angle with compass and straightedge or ruler How to construct a 60 degree angle with compass and straightedge or ruler How to construct a 90 degree angle with compass and straightedge or ruler How to bisect an angle with compass and straightedge or ruler Difference of two angles using compass and straightedge or ruler How to bisect a segment with compass and straightedge or ruler How to construct the centroid of a triangle with compass and straightedge or ruler Finding the center of a circle or arc with compass and straightedge or ruler Finding the center of a circle with any right-angled object How to construct circumcenter of a triangle with compass and straightedge or ruler How to construct a circle through the 3 vertices of a triangle with compass and straightedge or ruler Complementary angle using compass and straightedge or ruler How to copy an angle with compass and straightedge or ruler Copying a line segment with compass and straightedge or ruler Copying a triangle with compass and straightedge or ruler How to construct (draw) a right triangle with a given one angle and one leg (LA) How to construct (draw) a perpendicular at a point on a line Supplementary angle using compass and straightedge or ruler Triangle given two angles and the included side (ASA) How to construct (draw) a square Constructions Introduction. Drawing shapes with compasses and straightedge How to construct a tangent to a circle at a point 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) a right triangle with a given leg and hypotenuse (HL) How to construct a triangle given two angles and a non-included side (AAS) How to construct (draw) a right triangle with a given one angle and hypotenuse (HA) Table of Contents Calculus - Formal approach to continuity Calculus - Informal continuity Calculus - making a function continuous and differentiable Calculus - Ratio Test Convex Polygon Definition Convex Perpendicular lines. (Coordinate Geometry) X-axis definition Origin - math word definition Parametric Equation of an Ellipse The Coordinate Plane Parametric Equation of a Circle Area and perimeter of a rectangle. (Coordinate Geometry) Parallelogram and its properties. (Coordinate Geometry) Parallel lines. (Coordinate Geometry) Coordinates of a point Teaching Notes: Limitations of the applets in the coordinate geometry section Midpoint Theorem (Coordinate Geometry) Introduction to Lines in Coordinate Geometry Print blank graph paper Introduction to Coordinate Geometry and the Cartesian Plane Line definition (Coordinate Geometry) General form of Equation of a Circle Circumscribed rectangle, bounding box. (Coordinate Geometry) Coordinates of a triangle centroid with calculator (Coordinate Geometry) Circle and ellipse drawing algorithm Distance between points Equation of a line - slope and intercept form. (Coordinate Geometry) Equation of a line - point - slope form. (Coordinate Geometry) General Equation of an Ellipse Basic Equation of a Circle Horizontal line definition. (Coordinate Geometry) Distance from a point to a line Incenter coordinates of a triangle with calculator (Coordinate Geometry) Intercept (b) of a line (Coordinate Geometry) Intersecting lines. (Coordinate Geometry) Quadrant Coordinates Rectangle and its properties. (Coordinate Geometry) Distance from a point to a line using two line equations Area of a polygon calculator Line Segment definition (Coordinate Geometry) Slope (m) of a line (Coordinate Geometry) Square and its properties. (Coordinate Geometry) Area and Perimeter of a Square. (Coordinate Geometry) Trapezoid area and perimeter. (Coordinate Geometry) Trapezoid and its properties. (Coordinate Geometry) Area of a triangle (Coordinate Geometry) Area of a triangle using the box method (Coordinate Geometry) Vertical line definition. (Coordinate Geometry) Ray definition (Coordinate Geometry) Y-axis definition Area of a polygon algorithm Distance from a point to a vertical or horizontal line Area of any polygon (Coordinate Geometry) Coordinates of the vertices of a regular polygon with calculator Distance from a point to a line using a formula Distance from a point to a line using trigonometry Coplanar - Math word definition How to copy an angle with compass and straightedge or ruler Copying a line segment with compass and straightedge or ruler Copying a triangle with compass and straightedge or ruler Corresponding Angles definition Corresponding COS - Math word definition Cosine - math word definition Graph of the Cosine function - Trigonometry Trigonometry Overview The trigonometry arccos() function - inverse cosine - math word definition Introduction to the 6 trigonometry functions CSC - Math word definition Cosecant Calculus - trigonometric Functions SOHCAHTOA - math word definition - Trigonometry Calculus - trigonometric Functions Solving Triangles Introduction to the 6 trigonometry functions Graph of the Cosine function - Trigonometry The trigonometry arccos() function - inverse cosine - math word definition Proof of the Law of Cosines Cosine - math word definition The Law of Cosines Cotangent COT - Math word definition Calculus - trigonometric Functions Introduction to the 6 trigonometry functions Cotangent Coterminal - math word definition Whole number - math word definition Natural number - math word definition Number Counting numbers (Whole numbers or natural numbers) Cardinal numbers (Whole numbers or natural numbers) Cpctc CSC - Math word definition Cosecant Volume of a cube with calculator Platonic solid Surface area of a cube with calculator Cube definition with calculator Cubic curve and graph display Cubic Calculus - Curve Analysis - Global Extrema Parabola definition (quadratic equation ) Math Open Reference Calculus - Curve analysis - Special cases Parabola - math word definition Parabola definition (focus / directrix form) Calculus - Basic curve analysis Interior angles of an inscribed quadrilateral Diagonals of an inscribed quadrilateral Inscribed (cyclic) quadrilateral Area of an inscribed quadrilateral Relation of a cylinder to a prism Volume of a partially filled cylinder with calculator Cylinder as the locus of a line Surface area of a cylinder with calculator Volume of a cylinder with calculator Derivation of the surface area of a cylinder Cylinder definition and properties Oblique cylinder