Question

8. For a button to fit through its buttonhole, the hole needs to be the size of the button's diameter. What size buttonhole is needed for a button with a circumference of 7.38 centimeters? (Use the value of 3.14 to represent pi.)

Answer 1

d=2.35cm

Explanation:

A circumference is the perimeter of a circle.

P= 7.38cm

The perimeter formula of a circumference is:

P = 2 * π* r

2 * r = d (circumference diameter)

Thus:

P = π * d

d = P/ π

d = 7.38cm / 3.14

d = 2.35cm