Elya Sabitova
by Sabitova2017 | 10 | 17251
by Sabitova2017 | 10 | 17251
A parallelogram where all four sides are equal. Diagonals bisect each other at 90° (perpendicular).
A quadrilateral is a four-sided polygon. The interior angles of any quadrilateral always sum to . Quadrilaterals are generally categorized by their symmetry and whether their sides are parallel. Common Quadrilaterals
Segment joining midpoints of two sides of a triangle is parallel to the third side and half its length. This leads to Varignon’s theorem: The midpoints of any quadrilateral form a parallelogram whose area is half the original (if convex).
