3 years ago

The length of the arc of this semi-circle is 70m. What is the length of the radius?

Mathematics

1 answer:

anzhelika [568]3 years ago

7 0

Answer:

r = 22.3m circa

Step-by-step explanation:

We know that the perimeter of a circle can be calculated as follows:

p = 2 $\pi$ r

So half of perimeter will be:

p/2 = $\pi$ r

We know that p/s = 70m, therefore:

r = 70m / $\pi \\$ = 22.3 m circa.

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