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2 years ago

The circumference of a coin is 18π cm. What is the radius? What is the diameter?

2 answers:

6 0

A coin is a circle. Circumference of a circle is determined using this following formula
2 × π × r = c
with r as the radius, and c as the circumference

Find the radius
To find the radius, use the formula above
2 × π × r = c
2 × π × r = 18π
2π × r = 18π
r = 18π/2π
r = 9
The radius of the circle is 9 cm

Find the diameter
The diameter is twice as long as the radius.
d = 2 × r
d = 2 × 9
d = 18
The diameter is 18 cm

Hoochie [10]2 years ago

4 0

6 I do believe so hope this helps!

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The circumference of a coin is 18π cm. What is the​ radius? What is the​ diameter?

The circumference of a coin is 18π cm. What is the radius? What is the diameter?