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Angle Bisector in Cartesian

Source:

February 25, 2006
ratiotrigonometryanalytic geometrygraphing linesslopecalculusintegration

Problem Statement

A triangle has vertices P=(−8,5)P=(-8,5), Q=(−15,−19)Q=(-15,-19), and R=(1,−7)R=(1,-7). The equation of the bisector of ∠P\angle P can be written in the form ax+2y+c=0ax+2y+c=0. Find a+ca+c.
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