A parallelogram: .
is a quadrilateral (a four sided polygon) .
has opposite sides parallel and of equal length .
has opposite angles equal The area of a parallelogram …is calculated by multiplying one sidelength by the perpendicular distance between that side and the sideparallel to it. A rectangle is a special parallelogram in that all four angles areequal and are right angles (90Â°). A rhombus is a special parallelogram in that all four sides are ofequal length. A square is a special parallelogram in that all four angles areequal (and are right angles) and all four sides are equal inlength. (MORE)
When all 4 corners are right angles. A parallelogram has two pairs of parallel sides. A rectangle has two pairs of parallel sides; therefore a rectangle is a par…allelogram. A rectangle also has four 90° angles; a parallelogram does not necessarily have four 90° angles, therefore a parallelogram may, or may not, be a rectangle.(MORE)
Squares are parallelograms because they carry the traits of a parallelogram. For a shape to be a parallelogram, both pairs of opposite sides must be parallel. This is true for… a square, so it is a parallelogram. Some other examples are rectangles and rhombuses. (MORE)
Both a parallelogram and the trapezoid are quadrilaterals (meaning they both have 4 sides). However, in a parallelogram, both pairs of opposite sides are parallel and equal. B…ut in a trapezoid, only one pair of sides are parallel, and the other pair are not).(MORE)