If the diameter of a circle changes from 8 cm to 4 cm, how will the circumference change? a) multiples by 1 2 b) multiplies by 2 c) increases by 6 d) decreases by 6

A) Multiples by

Step-by-step explanation:

Let be circumference of original circle and be the circumference of new circle.

We have been given that the diameter of a circle changes from 8 cm to 4 cm. We are asked to find how the circumference of the circle will change.

We will use circumference of circle formula to solve our given problem.

, where, r represents radius of the circle.

Since the radius of a circle is half the diameter, so we will divide the diameter of circle by 2 to get the radius.

Therefore, the circumference of the new circle will be the the circumference of original circle and option A is the correct choice.

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step-by-step explanation:

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