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*segun la formula de heron:
s=1/2 (10+7)
s=1/2 (17cm)
s= 8,5cm.
A=√(8,5)(8,5-10)(8,5-7)
A=√(8,5)(1,5)(1,5)
A=√19,12 cm³
A=4,37 cm
espero que ayude algo!!