Circle sector

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

Correct answer:

r =  17.9923 cm

Step-by-step explanation:

S=452 cm2 α=160  k=α/360=160/360=940.4444  S=k πr2  r=k πS=0.4444 3.1416452=17.9923 cm

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