How can I find the radius of a circle?

How can I find the measure of a circle's arc without it's radius?

  • Okay, so I have a circle, with a 90 degree angle, split in two, to make two angles - one 50 degrees and the other - I assume would be 40 degrees, although it doesn't specify.. the ...show more

  • Answer:

    All you can do is give the length of the arc as a fraction of the circumference. arcAB = (50/360)C = (5/36)C or (5/18)(pi)(r)

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If you don't have a single length measurement on there than the problem is unsolvable. If you're meant to find the lengths using a ruler, find the radius.

Dane

You can solve it taking radius= r

Jahanvi

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