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All parallelograms do not have 90 degree angles. Those that do are called rectangles, a special subgroup within the term.
All that is required of a parallelogram is that opposite sides are parallel. Another special case of parallograms is the rhombus, a parallelogram with 4 equal sides but no right angles.
A parallelogram is a 4-sided polygon where the opposite sides are parallel. A rectangle is a type of parallelogram, but it has the added requirement that all angles are right angles (90°).
Sometimes the term parallelogram is used to indicate that a regular quadrilateral is not a rectangle, but has two pairs of identical angles.
Rectangle is "a parallelogram with one right angle", (which means all angles are right)
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Can a parallelogram be a rectangle and a square?
the three special quadrilaterals that can be a parallelogram are a rectangle, a square, and a rhombus Actually, this is incorrect. All squares are rectangles. All rectangles are parallelograms. Therefore all squares are parallelograms. But not all parallelograms are rectangles. And not all rectangles are squares.
All parallelograms are rectangles?
False
All rectangles are parallelograms?
True
All rectangles are?
parallelograms and,or quadrilaterals
Are all parallelograms squares true or false?
False! Squares are parallelograms. Parallelograms can be squares or rectangles or neither.
