sarapereira17
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Find the radius of a circle in which the central angle of (pie /4 ) radian determines a sector with an area of 86m^2

A-14.80m
B-20.92m
C-68.44 m
D- 10.46m

Respuesta :

area of sector  = 1/2 * r^2 * x   where r = radius and x = angle in radians

86 = 1/2 * r^2 * pi/4

r^2 = 2 * 86 * 4  / pi  =  219

r =  sqrt 219

= 14.80

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