Question

calcule as áreas abaixo​

Answer 1

a) A=l²

$A = {4}^{2} = 16 {cm}^{2}$

b) A=b.h

$A = 6.2 = 12 {cm}^{2}$

c)

$A = \frac{b.h}{2}$

$A = \frac{5.2,5}{2} = \frac{12,5}{2} = 6,25 {cm}^{2}$

d) A=b.h

$A = 8.3 = 24 {cm}^{2}$

e)

$A = \frac{D.d}{2}$

$A = \ \frac{10,5.3,5}{2} = \frac{36,75}{2 } = 18,375 {cm}^{2}$

f)

$A=\frac{(B+b).h}{2}$

$A= \frac{(8 + 3).3,5}{2} \\ = \frac{11.3,5}{2} = \frac{38,5}{2} \\ = 19,25 {cm}^{2}$