Question

Simulado
1. A área total de um prisma triangulo regular de
aresta da base 2 cm e altura V3 cm é:
c) 83
a) 73 cm
cm2
b) 413 cm2
d) 573 cm?​

Answer 1

Resposta:

Vamos lá! Pra descobrir a largura da lateral, aplicaremos a Teoria de Pitágoras:

$h^{2} =1^{2} +\sqrt{3} ^{2} \\\\h^{2} =1 +3\\\\h^{} =\sqrt{4}\\\\h=2cm$

$A_{b/triang}= 2.2^{} \\\\A_{b/triang}= 2.2\\\\A_{b/triang}= \dfrac{4}{2} \\\\A_{b/triang}= 2cm^{2} \\\\\\A_{laterias}= 3.(2.2 )/2\\\\A_{laterias}= 6 cm^{2}\\\\\\A_{total}= 2+6\\\\A_{total}= 8cm^{2}$