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Find the length of the red arc. Leave your answer in terms of pi.

Find the length of the red arc. Leave your answer in terms of pi.-example-1
User Roberkules
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1 Answer

2 votes

Known :

r = 18 m

θ = 90° (because right angle)

Asked :

arc length = ...?

Answer :

Arc length


= (θ)/(360) * 2\pi r \\ = (90)/(360) * 2 * \pi * 18 \\ = (1)/(4) * 36\pi \\ = 9\pi\: cm

So, length of the red arc is 9π cm

Hope it helps and is useful :)

User Ghtn
by
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