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Area of a Segment. Radius 6.8 and Central Angle is pi/8?

according to the http://mathforum.org/dr.math/faq/formulas/faq.circ...

i should use the formula S = (1/2)xr^2 - (1/2)sin(x)r^2 or ((r^2)/2)(x - sin(x))

so i get S = (((6.8)^2)/2)((pi/8) - sin(pi/8)) = .23156

so i used the Area of a Sector formula.

so

A = (1/2)(pi/8)(6.8)^2 = 9.1

I'm doing online homework, and i've submitted both values and neither one are acceptable.

what the hell is going on.

1 Answer

Relevance
  • 1 decade ago
    Favorite Answer

    (PI x R^2) / 16 = answer

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