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Q: What are parallelograms with four right angles called?

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No, because to have a rectangle, you need to have four right angles, and parallelograms dont have to have right angles. However, all rectangles are parallelograms.

Squares

Generally, there are no right angles in a parallelogram, but rectangles and squares can be seen as special parallelograms, as they have all the qualities needed to be classed as parallelograms, and in addition, they have four right angles.

It's a rectangle

Yes, they are parallelograms with four right angles.

Yes, rectangles are a special case of parallelogram, with four right angles.

No, only squares and rectangles have four sides and four right angles (90 degrees). Parallelograms, trapeziums, kites, and rhombuses all have four sides, but they have different size angles.

Rectangles, because a square can be a rectangle, but a rectangle can't be a square.

Every rectangle has four (straight) sides, and four (right) angles. All rectangles are also polygons, quadrilaterals, and parallelograms.

All quadrilaterals have four angles including: squares rectangles rhombus trapezoids parallelograms

A rectangle - has four right-angles at the corners. A Parallelogram - has no right-angles, but has opposite angles equal. Technically - a rectangle is a parallelogram, but a parallelogram can never be a rectangle. Clarification - Actually, all rectangles are parallelograms, but not all parallelograms are rectangles. The definition of a parallelogram is that of a four-sided shape where the opposite sides are parallel. There is no angle-size limitation in the definition. Squares, rectangles and rhombuses are all parallelograms.

All "parallelograms" have opposite sides that are parallel. If all four sides have an equal length and the angles are not all right angles, it is a rhombus. If there is any right angle, then they are all right angles and the parallelogram is a square.(note : it is not possible for a quadrilateral to have four equal sides without being one of these parallelograms.)

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