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# Theorem

"theorem" is referenced in the pages listed below.

This page explores the Second Fundamental Theorem of Calculus. Interactive calculus applet.
From two points on a circle, the central angle is twice the inscribed angle
A triangle cannot be constructed from three line segments if any of them is longer than the sum of the other two.
Definition of Thales theorem - the diameter of a circle always subtends a right angle to any point on the circle.
A biography of Thales. A short description of his life and contributions to the study of geometry. Links to other resources.
Any side of a triangle is always shorter than the sum of the other two sides.
A biography of Pythagoras of Samos. A short description of his life and contributions to the study of geometry, including Pythagoras' Theorem. Links to other resources.
Pythagorean Theorem
The definition and characteristics of the exterior angles of triangles
This page explores the Fundamental Theorem of Calculus. Interactive calculus applet.