First, you have to do the formula:
A= 1/2(b1+ b2)×h
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Now plug in the numbers:
A=1/2(18+14)×12
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Now solve:
A=1/2(18+14)×12
A=1/2(32)×12
A=16×12
A= 192in²
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Finally, the answer is 192in²
