Question

the radius of circle a is 13 units. the radius of circle b is 2 times the radius of circle a. what is the circumference of circle b? leave your answer in terms of π.

Explanation:

Step1: Find radius of circle B

Radius of A is 13, so radius of B is \( 2\times13 = 26 \) units.

Step2: Use circumference formula

Circumference of a circle is \( C = 2\pi r \). Substitute \( r = 26 \): \( C = 2\pi\times26 = 52\pi \).

Answer:

\( 52\pi \) units