A flashcard featuring an illustration of a polygon with four equal sides

A flashcard featuring an illustration of a polygon with four equal sides

A flashcard featuring an illustration of a polygon with four unequal sides

Illustration of a parallelogram with altitude and diagonal drawn.

Illustration of a parallelogram with diagonals drawn to show they bisect each other.

Illustration of a two equal parallelograms. Two parallelograms are equal, if two sides and the included…

Illustration of a two polygons. Polygons may be mutually equiangular without being mutually equilateral.

Illustration of two polygons. Polygons may be mutually equilateral without being mutually equiangular…

Illustration of an axis of symmetry drawn with respect to a quadrilateral.

Illustration of a quadrilateral which has two adjacent sides equal and the other two sides equal. It…

Illustration of a trapezoid, with the median drawn. The median of a trapezoid is parallel to the bases,…