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Perimeter of a rectangle

Perimeter of a rectangle is the total length of its sides. The opposite sides of a rectangle are congruent.

Perimeter of a rectangle

P = a + b + a + b
Where P is the perimeter, a is the shorter side, and b is the longer side.

Example:
If a = 3 and b = 5 then:
P = 3 + 5 + 3 + 5 = 16