Question

If the diameter of a circle changes from 8 cm to 4 cm , how will the circumference change ?

a. Multiplies by 1/2
b. Multiplies by 2
c. Increases by 6

Answer 1

The answer is the letter (A)

Answer 2

the circumference 1 = π*D=8π

if D=4, the circumference 2 =4π=1/2* the circumference 1

⇒ a is the answer