Please help. Don't know what to do. (Geometry)

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asked Apr 10, 2018 130k views

1 Answer

Achyut Rastogi · Answer 1 · 2018-04-16T05:30:48+0000

(360/10)/2 = 18°

Cos(18)=a/r=a/5 ---> a=4.8

Tan(18)=o/a=o/4,8 ---> o=1.6

Area = 1/2 * 4.8 * 1.6 * 20 = 76.8

The right answer is A, i have just rounded up, so i didn't get is precise.

Please help. Don't know what to do. (Geometry)

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