Question

Me ajudem, por gentileza?​

Answer 1

Resposta:

A)

AO + BO:

$a = \pi \times {r}^{2} \\ a = 3.14 \times {6}^{2} \\ a = 3.14 \times 36 \\ a = 113.04$

AB:

$a = \pi \times {r}^{2} \\ a = 3.14 \times {12}^{2} \\ a = 3.14 \times 144 \\ a = 452.16 \\ a = \frac{452.16}{2} = 226.08 \\ a = 226.08$

(AO + BO) - AB

113,04 - 226,08 = 113,04

Resposta : 113,04

B)

AC + BD:

$a = \pi \times {r}^{2} \\ a = 3.14 \times {3}^{2} \\ a = 3.14 \times 9 \\ a = 28.26$

CD:

$a = \pi \times {r}^{2} \\ a = 3.14 \times {6}^{2} \\ a = 3.14 \times 36 \\ a = 113.04 \\ a = \frac{113.04}{2} = 56.52 \\ a = 56.52$

AB = 226,08

(AC + BO) + CD - AB

28,26 + 56,52 - 226,08 = 141,3

Resposta: 141,3