Polygons and Polyhedra

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The circumcircle of a polygon is defined: the circle that passes through every vertex.

A biography of Euclid. A short description of his life and contributions to the study of geometry. Links to other resources.

This page gives two methods for finding the area of a kite: a geometry formula and a trigonometric formula. Numerous connected pages offer a wide variety of information on all types of polygons.

A helpful scientific calculator that runs in your web browser window.

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.

How to find the area of an irregular polygon by breaking it down into triangles

A biography of Thales. A short description of his life and contributions to the study of geometry. Links to other resources.

Formula and description of the perimeter of a trapezoid.

Trapezoid median (midline or midsegment) definition and properties

Area of a trapezoid. Definition and formula

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