leslie66
leslie66
25-04-2017
Mathematics
contestada
Please help. Don't know what to do. (Geometry)
Respuesta :
mohabbasem
mohabbasem
25-04-2017
(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.
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