Posted by Tabitha on Friday, January 14, 2011 at 1:06pm.
Find the area of a sector of a circle with a radius of 3 m and a central angle of 125degrees.
Math/Trig - helper, Friday, January 14, 2011 at 3:26pm
Area K = 1/2 r^2 * angle in rads
Convert deg to rads
125 deg * pi/180 = 25pi/36 rads
K = 1/2 * 3^2 * 25pi/36
K = ? m^2
you do the math
Area K is expressed in m^2 (in this case)
Math/Trig - Reiny, Friday, January 14, 2011 at 3:50pm
area of whole circle = 9π
area of sector = (125/360)(9π) = appr. 9.8 m^2
Math/Trig - Bosnian, Saturday, January 15, 2011 at 12:45am
Area of circle:
Area of your sector=r^2*pi*(125/360)=3^2*pi*125/360=9*pi*125/360
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