Question

What is the radius of a circle with circumference 22 m?

Answer 1

Step-by-step explanation:

r≈3.5m

C Circumference

22

m

Using the formula

C=2πr

Solving forr

r=C

2π=22

2·π≈3.50141m

Approximately

3.5

m

Explanation:

The circumference of a circle C is equal to:

C

=

2

⋅

π

⋅

r

That's because the diameter of a circle fits

π

times in the circumference. So if you solve

r

r

=

C

2

⋅

π

=

22

2

⋅

π

≈

3.5

(using the approximation

π

≈

22

7

)

Answer 2

Answer:

3.5 cm

Step-by-step explanation:

Using the formula

c=2πr

r =C/2π = 22/2×π ≈ 3.50141cm