SOLUTION: The circumference of a circle is 42 meters. What is the approximate radius of the circle?

Question 333634: The circumference of a circle is 42 meters. What is the approximate radius of the circle?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the circumference of a circle formula.

Divide both sides by to isolate "r".

Flip the equation.

Plug in .

Replace with (note: Use more digits of to get better accuracy).

Multiply 2 and to get .

Divide into to get (this figure is approximate).

Round to the nearest thousandth.

So the radius of a circle which has a circumference of meters is about meters.
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