A square because a parallelogram has two parallel sides and have two adjacent right angles but a square and a rectangle have also a two adjacent right angles.
No, only in a square (regular parallelogram).The opposite angles are EQUAL in a parallelogram, and the adjacent angles are SUPPLEMENTARY(they equal 180 degrees).So if any angle in a parallelogram is a right angle, they all are. Otherwise, there are no right angles.The angles of a parallelogram will average 90 degrees, as there are 360 degrees in any quadrilateral, (360/4 - 90) and 180 degrees in two adjacent non-equal angles (180/2 = 90).
A parallelogram.Types of parallelogram:Rhomboid - A quadrilateral whose opposite sides are parallel and adjacent sides are unequal, and whose angles are not right anglesRectangle - A parallelogram with four angles of equal sizeRhombus - A parallelogram with four sides of equal length.Square - A parallelogram with four sides of equal length and four angles of equal size (right angles).
All squares have TWO SETS of opposite, parallel sides. A square is a parallelogram with 4 equal sides and 4 equal angles (right angles) of which adjacent sides are perpendicular. The related parallelogram, the rhombus, or "diamond" shape, also has 4 equal sides, but no right angles, where opposite angles are equal and adjacent angles are supplementary (sum to 180 degrees).
A shape that has 2 pairs of equal sides and no right angles is a kite or a parallelogram. In a parallelogram, each side is equal to the one directly opposite; in a kite, the equal sides are adjacent to one another.
A parallelogram with four equal sides and no right angles is a rhombus.
Generally no. If they are perpendicular, all four angles are right angles and the parallelogram is usually called a rectangle.
a rhombus is a parallelogram with 4 equal sides. It does not need right angles; that is a special case which is a square
No, that's a square. A rhombus is a parallelogram with 4 equal sides, but no right angles.
Yes. This is true because opposite angles are congruent and adjacent angles are supplementary.
A rectangle IS a parallelogram. However, it is a special case, since not only opposite, but also adjacent angles are equal. Since the angles must sum to 360 degrees, if they must all be equal you have 90 degrees or right angles for all of them . A rectangle is a quadrilateral with 4 right angles. A rhombus is a quadrilateral with 4 equal sides. 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 90°.