Polygons and Polyhedra

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Trapezoid median (midline or midsegment) definition and properties

Area of a trapezoid. Definition and formula

Trapezoid definition and properties

Definition of Thales theorem - the diameter of a circle always subtends a right angle to any point on the circle.

Definition and properties of a tetragon

Definition and properties of pythagorean triples

Pythagoras' Theorem

Definition of the triangles of a polygon, including a formula to calculate the number of them in an n-gon

The sides of a polygon are defined and two formulas for finding the side length for a regular polygon.

Definition of a regular (equiangular) polygon

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