Circle sector

Circular sector with a central angle 160° has area 452 cm2. Calculate its radius r.

Correct result:

r =  17.9923 cm

Solution:

S=452 cm2 α=160 k=α/360=160/360=490.4444  S=k πr2  r=Sk π=4520.4444 3.1416=17.9923 cm



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