3 years ago

Assuming that a 90° arc has an exact length of , find the length of the radius of the circle.

1 answer:

7 0

If the exact length is s, you have
.. s = r*θ . . . . θ = π/2
.. r = s/θ
.. r = 2s/π

Fill in the exact length for "s" in the formula and compute to find the radius.

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