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whatlifeforme

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## Homework Statement

Use Pappus' Theorem for surface area and the fact that the surface area of a sphere of radius c is 4(pi)c^2 to find the centroid of the semicircle x= sqrt ( c^2 - y^2)

## Homework Equations

S = 2 (pi) * p * L

where s=surface area; p=distance from axis of revolution; L= length of the arc

## The Attempt at a Solution

1. centroid of semicircle. should i put the equation in circle form, and attempt to solve from that?