A Proof of The Trapezoid Angle Theorem

A trapezoid is a quadrilateral whose two sides are parallel. In the figure below, is a trapezoid and is parallel to .┬áIn this post, we are going to prove that in a trapezoid, the consecutive angles between a pair of parallel sides are complementary. That is, we are going to prove in the figure above […]
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The Proof of the Kite Symmetry Theorem

A kite is a quadrilateral with two distinct pairs of congruent sides. The common vertices of its congruent sides are called its ends. In quadrilateral below, the distinct pairs of congruent sides are & and & . The ends are and . Exercise: Locate the ends and the pairs of the distinct pairs of the […]
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