Question

multiple choice problem.. someone please help

Answer 1

I did it this way:
First use Trig to find the radius of the circle. The radius is the hypotenuse of the right triangle.
sin 60º=4.33/r
r = 4.33/(sin 60º) = 4.9998
Area of circle = πr² = 78.5335
Area of the 3 triangles = 3*bh/2=32.4737
Area of shaded = circle - 3 triangles = 46.0598
(D)