A rhombus has all sides equal but not angles. The opposite angles in a rhombus are equal though.
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A parallelogram is a square when all 4 angles of the parallelogram are equal to 90 degrees and all 4 sides are congruent to each other
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???
Corresponding sides and angles are not all congruent.
A parallelogram is a four sided figure. that has congruent angles and all sides are parallel
In an isosceles triangle 2 sides are congruent and 2 angles are congruent. In an equilateral triangle all 3 sides are congruent and all 3 angles are congruent also.