Question

For two circles, A and B, with diameters d1and d2mas described in the problem, if d 1=1 and d2=2r, and if CB denotes the circumference of circle B, which equation is true?

a. CB = π d₁
b. CB = 2π d₁
c. CB = π d₂
d. CB = 2π d₂

Answer 1

The circumference of circle B, denoted by CB, is given by the equation CB = 2πd₂.

Step-by-step explanation:

The circumference of a circle is given by the equation: CB = 2πr, where r is the radius of the circle.

In this case, d₁ represents the diameter of circle A, which is equal to 1. So, the radius of circle A is d₁/2 = 1/2.

On the other hand, d₂ represents the diameter of circle B, which is given as 2r. So, the radius of circle B is d₂/2 = (2r)/2 = r.

Therefore, the correct equation is CB = 2πd₂.