The area of a trapezoid is 230 cm². The height is
20 cm and the length of one of the parallel sides is
8 cm. Find the length of the second parallel side. Express your answer as a simplified fraction or a decimal rounded to two places.

Step-by-step explanation:

Let b be the length of the second parallel side

Area of a trapezium is given by

where

h is the height

a and b are the parallel sides

From the question

Area = 230 cm²

height = 20cm

one of parallel side / a = 8 cm

Substitute the values into the above formula and solve for b

That's

Reduce the fraction with 2

That's

Expand the terms

That's

Divide both sides by 10

We have the final answer as

Hope this helps you

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step-by-step explanation:

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