Question

calcule a area de um triângulo cujos os lados medem 9 m 12m 6m?

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Answer 1

Resposta:

A = 26,14 m² aproximadamente

Explicação passo a passo:

Fórmula de Heron

$p=\frac{a+b+c}{2}\\\\p=\frac{9 + 12 + 6}{2} =\frac{27}{2} =13,5\\\\p-a = 13,5-9=4,5\\\\p-b=13,5-12=1,5\\\\p-c=13,5-6=7,5\\\\A=\sqrt{p(p-a)(p-b)(p-c)} \\\\A=\sqrt{13,5.4,5.1,5.7,5} \\\\A=\sqrt{683,4375}\\\\A= 26,14 ~~aproximadamente$