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## Homework Statement

Three equal point charges, each with charge 1.00 microC, are placed at the vertices of an equilateral triangle whose sides are of length 0.200 m. What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.)

Use epsilon_0 = 8.85×10−12 F/m for the permittivity of free space.

## Homework Equations

This is what I'm not sure of. I thought in order to find electric potential energy, you would multiply q by the distance and then add them together. (1xe-6)*(.200) =2e-7*(3) = 6e*-7 but that's wrong.

## The Attempt at a Solution

see above.