Question

the 3 sum pls find the area
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Answer 1

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the area of the pentagon PQRST IS

$=( \frac{1}{2} \times 3 \times 10) + ( \frac{1}{2} \times 5 \times 12) + ( \frac{1}{2} \times 12 \times 7) \\ = 15 + 30 + 42 \\ = 87 \: cm {}^{2}$

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