A parallelogram doesn't necessarily have any perpendicular sides, but it can. If it has
one single 90-degree angle, then it has four of them, and it's a rectangle.
Apexvs geometry 2nd sem -- false.
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No, a parallelogram does not have perpendicular sides by definition. A parallelogram is a quadrilateral with opposite sides that are parallel and equal in length. Perpendicular sides would form a right angle, which is a characteristic of rectangles, squares, and other types of quadrilaterals, but not parallelograms.
If a quadrilateral has two pairs of opposite congruent sides, then the quadrilateral is a parallelogram.
A parallelogram. Opposite sides are parallel and congruent.parallelogram is a quadrilateral with two sets of parallel sides. The opposite sides of a parallelogram are of equal length, and the opposite angles of a parallelogram are congruent. The three-dimensional counterpart of a parallelogram is a parallelepiped.Parallelogram - A quadrilateral whose opposite sides are parallel
parallelogram
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