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Perimeter of a Trapezoid Formula

The type of polygon that is nothing but a quadrilateral having at least a pair of parallel sides is called Trapezoid. Two sides of a trapezium are parallel. The perpendicular distance between the parallel sides is called the altitude.

trapezoidThe perimeter of a trapezoid formula is given by

\[\large P=a+b+c+d\]

a, b, c, d are the lengths of each side.

Solved Examples

Question 1: Trapezoid ABCD has legs 4 cm and 7 cm in length. Its bases are 12 cm and 15 cm respectively. Find the perimeter of the trapezoid.


a = 4 cm
b = 7 cm
c = 12 cm
d = 15 cm

Perimeter is given by
p = a + b + c + d
= 4 + 7 + 12 + 15
= 38 cm.

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