Q: Is a parallelogram a quadrilateral in which opposites sides are perpendicular?

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false

No. The only conditions to quality as a parallelogram is that it is a quadrilateral, and that opposite sides are parallel.

Yes, it is.

A quadrilateral is a polygon with four 'sides' . A parallelogram is a quadrilateral with two sets of parallel sides.

The key is the object is quadrilateral with parallel sides. It is a parallelogram. It is also a rhombus.

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A parallelogram.

parallelogram

false

False. Bisecting diagonals is sufficient to guarantee a parallelogram, but the diagonals will only be perpendicular if the sides of the parallelogram are equal.

"It has four sides" is a description that does not guarantee that a quadrilateral is a square.

No. The only conditions to quality as a parallelogram is that it is a quadrilateral, and that opposite sides are parallel.

A quadrilateral is a polygon with four sides. A parallelogram is a quadrilateral in which the opposite sides are parallel.

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.

Yes, it is.

A parallelogram with perpendicular sides is called a rectangle.

A parallelogram must have 4 sides and so it must be a quadrilateral. However, the sides of a quadrilateral need not be parallel so a quadrilateral need not be a parallelogram.

A quadrilateral is a polygon with four 'sides' . A parallelogram is a quadrilateral with two sets of parallel sides.