1985 AHSME Problems/Problem 2
Problem
In an arcade game, the "monster" is the shaded sector of a circle of radius cm, as shown in the figure. The missing piece (the mouth) has central angle . What is the perimeter of the monster in cm?
Solution
The two straight sides of the "monster" are radii of length cm, so their total length is cm. The circular arc forms of the entire circle, and a circle with radius cm has circumference cm, so the length of the arc is cm. Hence the total perimeter in cm is .
See Also
1985 AHSME (Problems • Answer Key • Resources) | ||
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Followed by Problem 3 | |
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