The radius of circle A is r cm. The radius of circle B is twice the radius of circle A. What difference between the circumferenc

Question

3 years ago

12

e of circle B and circle A (in cm)?

1 answer:

avanturin [10] · Answer 1 · 2022-10-06T22:35:32+03:00

9514 1404 393

Answer:

2πr cm

Step-by-step explanation:

The circumference of a circle of radius r is ...

C = 2πr

For a radius of (r cm), the circumference is ...

A = 2π(r cm) = 2πr cm

For a radius of (2r cm), the circumference is ...

B = 2π(2r cm) = 4πr cm

Then the difference between the circumferences is ...

B -A = (4πr cm) -(2πr cm) = 2πr cm . . . . difference in circumference