Find the perimeter of pacman? Circle missing wedge
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Find the perimeter of pacman? Circle missing wedge

[From: ] [author: ] [Date: 12-05-30] [Hit: ]
-The total perimeter is 2πr = 8π.The wedge perimeter is (60/360)*2πr = π(4)/3 = (4/3)π.You also have to add 2r to account for the mouth, otherwise youre just finding the perimeter of a partial circle. So........
Pacman shape.
Radius is 4 cm
The wedge is 60 degrees.
Working out please! :)
2 times Pi times R and then what?
what is the wedge?

-
The total perimeter is 2πr = 8π.
The wedge perimeter is (60/360)*2πr = π(4)/3 = (4/3)π.

You also have to add 2r to account for the mouth, otherwise you're just finding the perimeter of a partial circle. So...

P = total perimeter - wedge perimeter + 2r
= 8π - (4/3)π + 8
= (24/4)π - (4/3)π + 8
= (20/3)π + 8 cm

Hope that helps.
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