Question

The circumference of a circle is 7.5. What is it’s diameter?

Answer 1

For ALL circles the circumference (call it ‘C’) is equal to Pi x diameter (call it ‘d’),

so C = Pi x d

But we are told that C = Pi x 7.5

So Pi x d = Pi x 7.5

If we divide both sides of this equation by Pi, we are left with the equation d = 7.5, which is the answer.

ANSWER: The length of the diameter of the circle is 7.5 units of length.