Lv 6
asked in Education & ReferenceHomework Help · 1 decade ago

Find the area of a sector with a central angle of 32° and a radius of 8.5 millimeters.?

I keep getting 6.4 but thats not one of the choices.. help please!!!

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  • 1 decade ago
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    The area of a sector is given by the equation A = ½r²θ, where θ is in radians.

    Alternatively, if want θ in degrees, you could use the formula A = πr²(θ/360).

    32° = 8π/45 rad

    A = ½(8.5)²(8π/45) = 20.176

    Make sure your calculator is in the appropriate mode.

  • 1 decade ago

    Area=(m/360)*Pi*r^2

    m= measurement of central angle

    r= radius

    (32/360)*π*8.5²=20.17600615

    (32/360)*3.14*8.5²=20.16577778

    hope this helped :]

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