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gprep - geometry

Expert replies
Source: — Problem Solving |

by durgesh79 » Tue Jun 17, 2008 10:29 am
length of the Arc ABC = 24

we know length of total circle (perimeter) = pi * d ( d is the diameter)

arc ABC = 2/3 * (perimeter) = 2/3 * pi * d

d = 11

The key here is that the equilateral traingle divides the circle in 3 equal parts.
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