Question

Помогите пожалуйста#3

Answer 1

1)
$l = 2\pi \times r = 2 \times 3.24\pi = 6.48\pi = 6.48 \times 3.14 = 20.3472 = \: 20.34$
2)
$s = \pi \times r {}^{2} = \pi \times 1.5 {}^{2} = \pi \times 2.25 = 3.1 \times 2.25 = 6.975 = 6.9$