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What is a quadrilateral that has four congruent sides and its diagonals are congruent?
Square.
If a quadrilateral has four congruent sides and its diagnols are congruent?
A square.
A quadrilateral with four congruent sides?
Parallelogram
What is a description of a parallelogram?
A parallelogram is a quadrilateral (4-sided figure) with both pairs of opposite sides parallel. That's usually the primary definition. There are properties common to all parallelograms: opposite sides are congruent, opposite angles are congruent, and diagonals bisect each other. Other special parallelograms have additional properties. A rectangle is a parallelogram with four right angles and its diagonals are congruent. A rhombus is a parallelogram with four congruent sides. Its diagonals are perpendicular and each diagonal bisects two angles of the rhombus. A square is a parallelogram as well. It has four right angles and four congruent sides, so it is also a rectangle and a rhombus. How's that for confusing???
A quadrilateral with four right angles and four congruent sides?
A square.
