Question

01:09:23

What is the radius of this circle if the circumference is 18 cm?
0
3 cm
9 cm
18 cm
36 cm

Answer 1

The formula for circumference of a circle is

2pi,R.

In which R= radius. Then we Insert 18 in for the circumstances.

so, 18=2πr

then solving for r

18=2

÷. ÷

2. 2

R = 9,,