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Diano4ka-milaya [45]
3 years ago
7

What's the answer to this question?

Mathematics
1 answer:
laiz [17]3 years ago
4 0
Area  = 1/2 h(b + B)
1/2.10.(b + 12) = 100
5(b + 12) = 100
b + 12 = 100 ÷ 5
b + 12 = 20
b = 20 - 12
b = 8
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