Rectangle, possibly a square if the adjacent sides are also equal.
It is a rhombus or a parallelogram
a rhombus, a quadrilateral without right angle, a quadrilateral with equal opposite parallel sides but no right angles
The quadrilateral described is a rectangle. In a rectangle, opposite sides are equal and parallel, and all four angles are right angles. This definition meets the criteria of having one pair of opposite sides that are equal and parallel, along with the presence of right angles.
A rectangle is a parallellogram with one right angle; A parallelogram is a quadrilateral with opposite sides equal and parallel.
The quadrilateral that has one pair of parallel lines and one right angle is called a trapezoid (or trapezium in some regions). In a right trapezoid specifically, one of the non-parallel sides is perpendicular to the bases, creating a right angle. This configuration allows for one pair of opposite sides to remain parallel while incorporating the right angle characteristic.
you can prove any one of these statements to prove that quadrilateral is a rectangle: -- Opposite sides are parallel and any one angle is a right angle. -- Opposite sides are equal and any one angle is a right angle. -- All four angles are right angles. -- Adjacent angles are complementary, and one of them is a right angle. -- Opposite sides are either equal or parallel, and area is equal to the product of two adjacent sides. -- Diagonals are equal.
A right angle trapezoid has 2 right angles, an acute angle and an obtuse angle It has a pair of opposite parallel sides of different lengths The 4 interior angles add up to 360 degrees
A rectangle is defined as "a parallelogram with one right angle" A parallelogram is defined as "a quadrilateral with opposite sides equal and parallel" This makes a rectangle a sort of second-generation quadrilateral!
That may be the longest description of a squarethat I have ever heard.
I am a rectangle.
It is a quadrilateral whose opposite sides are parallel and has no right angles
I don't think this is possible. there is not a quadrilateral with these qualities. If it is a quadrilateral, it will automatically have parallel lines, but there is not one that has both. The closest one would be the trapezoid, with a set of parallel lines, but no right angle. The square and rectangle have two sets of parallel lines and 4 right angles.