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Isosceles triangle theorem Angles opposite the legs of an isosceles triangle are congruent

Steps to a Coordinate proof. 1. 2. 3. 4.

Use the origin as a vertex of the triangle. Place at least one side of the triangle on the axis. Keep the triangle in the 1st quadrant whenever possible. Use coordinates that make computations.

Given: Prove:

is isosceles

Geo pg 8  

Isosceles triangle theorem Angles opposite the legs of an isosceles triangle are congruent 1. Use the origin as a vertex of the triangle. 2....

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