Question

Please help me just a and d

Answer 1

Hello!

a)

C = 2πr C= 2*π *5 31,4cm

= 2*3,14* 5

d)

r =2/2 => 1m

C= 2πr C= 2*π*1 6,28m

= 2 *3,14*1

Answer 2

C = 2 x pi x r

if r = 5 cm

C = 2 x pi x 5 = 10 x pi

≈ 10 x 3,14 ≈ 31,4 cm

C = 2 x pi x r = pi x d

if d = 2 m

C = pi x 2

≈ 3,14 x 2 ≈ 6,28 m