Question

POR FAVOR AYUDA DOY CORONA Y ESTRELLAS AYUDA PLIS ES PARA ANTES DE LAS 10 PLIS

Answer 1

Explicación paso a paso:

pi = 3.14

1)

R = 7

$p = 2 \times \pi \times r \\ p = 2 \times \pi \times 7 \\ p = 14\pi \\ o \\ p = 14 \times 3.14 = 43.93cm$

$a = \pi \times {r}^{2} \\ a = \pi \times {7}^{2} \\ a = 49\pi \\ o \\ a = 153.86 \: c {m}^{2}$

2)

D = 12cm ; r = 6 cm

$p = 2 \times \pi \times 6 \\ p = 12\pi \\ o \\ p = 37.68$

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

3)

r = 4.5 cm

$p = 2 \times \pi \times 4.5 \\ p = 9\pi \\ o \\ p = 28.26$

$a = \pi \times {4.5}^{2} \\ a = 20.25\pi \\ o \\ a = 63.585$