Question

Calculate the length of the circumference of a circle with radius of 2.8cm

Answer 1

Hello. D= 2×r D=2×2,8 D=5,6cm. Circumference= $\pi$ × D ; C= 3,14×5,6 C=17,584cm. I hope to have helped you.

Answer 2

(let pi be 22/7) 
2 x 2.8 x 22/7 
44 x 0.4 
Answer 17.6cm