# Area and Perimeter of Rectangle / Parallelogram Calculator

A Rectangle is a plane figure with four straight sides and four right angles, one with unequal adjacent sides, in contrast to a square. Every angle of rectangle is a right angle (900).
Calculate the area, perimeter of Rectangle(Rectangle Calculator)
 Formula: [ base×height ] Base (b): Height (h): Area of Rectangle:
 Formula: [ 2(base) + 2(height) ] Side1 (b): Side2 (h): Perimeter of Rectangle :
Formula
Area of Rectangle = b*h
Perimeter of Rectangle = 2(b) + 2(h)

where,
b = base, h = heigth

Area of Parallelogram = b×h
Perimeter of Parallelogram = 2(b) + 2(h)

where,
b = breadth, h = height

A rectangle is defined as a quadrilateral where all four of its angles are right angles.

The opposite sides are parallel and congruent.
The diagonals bisect each other.
The diagonals are congruent.

A rectangle  is also a parallelogram.

Examples:
Find the area and perimeter of a rectangle for the breadth 4 and the height 5.

Step 1: Find the area.
Area = b×h = 4×5 = 20

Step 2: Find the perimeter.
Perimeter = 2(b) + 2(h) = 2(4) + 2(5) = 8 + 10 = 18.