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The area of a trapezoid is 240 cm2. The height is 20 cm and the length of one of the parallel sides is 10 cm. Find the length of the second parallel side

3 answers

Area of trapezoid:

A= (a+b)*h / 2

where:

a= top base
b= bottom base
h= height

note: a and be are the only parallel sides in a trapezoid

240 = (10+b)*20 / 2

solve for b

240=(10+b)*20/2

12 cm

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