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kirza4 [7]
3 years ago
9

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\pir

So half of perimeter will be:

p/2 = \pir

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

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

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