Question

calcule a area dos triangulos abaixo​

Answer 1

Resposta:

a) 7$m^{2}$     b) 27$cm^{2}$     c) 16,25$mm^{2}$

a)

$A = \frac{b . h}{2}\\\\A = \frac{ 2 . 7}{2}\\\\A = \frac{14}{2}\\\\A = 7 m^{2}$

b)

$A = \frac{12 . 4,5}{2}\\\\A = \frac{54}{2}\\\\A = 27 cm^{2}$

c)

$A = \frac{ 5 . 6,5}{2}\\\\A = \frac{32,5}{2}\\\\A = 16,25mm^{2}$