A rhombus or square. Although a square has to have four ninety degree angles. Rhombuses can be any shape as long as they have four equal sides.
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A rhombus is a parallelogram with 4 equal sides. Many parallelograms do not have 4 equal sides. All parallelograms have 2 pairs of equal opposite sides.
Yeah they have 4 equal sides Only some parallelograms have 4 equal sides. Such a parallelogram is called a rhombus. In general, a parallelogram has two different pairs of opposed equal sides. Like a rectangle given a sideways push at opposite corners.
Opposite angles/sides are equal.
a square can also be called a rhombuses, and rectangles, and parallelograms.
Parallelograms have 4 sides, it is a quadrilateral with the opposite sides parallel, and the opposite angles are congruent.4