SOLUTION: the area of a trapizoid is 108cm squared the height is 12cm and the length of one parrallel sides is 8cm. find the length of the 2nd parallel side.

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Question 414806: the area of a trapizoid is 108cm squared the height is 12cm and the length of one parrallel sides is 8cm. find the length of the 2nd parallel side.
Answer by nerdybill(7384) About Me  (Show Source):
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the area of a trapizoid is 108cm squared the height is 12cm and the length of one parrallel sides is 8cm. find the length of the 2nd parallel side.
.
area of any trapezoid is:
((b1 + b2)/2)h
.
where
b1 is length of one parallel side
b2 is length of opposite parallel side
h is height
.
plugging in what was given:
Let x = length of 2nd parallel side:
108 = ((8 + x)/2)(12)
108 = (8 + x)(6)
18 = (8 + x)
10 cm = x