Parallelogram
ABOUT:
A Parallelogram is a flat shape with opposite sides parallel and equal in length.
 and  show equal sides
 Opposite sides are parallel
 Opposite sides are equal in length
 Opposite angles are equal (angles "a" are the same, and angles "b" are the same)
 Angles "a" and "b" add up to 180°, so they are supplementary angles.
Area of a Parallelogram
The Area is the base times the height:
Area = b × h
(h is at right angles to b)
Example:
A parallelogram has a base of 9 m and is 2 m high, what is its Area?
Area = 9 m × 2 m = 18 m²
Perimeter of a Parallelogram
The Perimeter is the distance around the edges.

The Perimeter is 2 times the (base + side length):
Perimeter = 2(b+sl)

DEMONSTRATION:
A parallelogram has a base of 24 cm and a side length of 12 cm, what is its Perimeter?
Perimeter = 2 × (24 cm + 12 cm) = 2 × 36 cm = 72cm
Diagonals of a Parallelogram
The diagonals of a parallelogram bisect each other.
In other words the diagonals intersect each other at the halfway point.