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= 1/2 x 4 x 3
= 6 cm²
b) L = 1/2 x 18 x 14
= 126 cm²
c) L = 1/2 x 10 x 6
= 30 cm²
d) L = 1/2 x (10 + 4) x 8
= 1/2 x 14 x 8
= 56 cm²
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