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Triangle Angle Bisector Theorem - MathHelp.com - Math Help

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For a complete lesson on the triangle angle bisector theorem, go to http://www.MathHelp.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn the following theorems related to similar triangles.

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Triangle Perpendicular Bisectors & Circumcenter

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Writing an Equation of a Perpendicular Bisector - Geometry

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This video teaches students how to write an equation of a perpendicular bisector. In particular, this video shows students how to calculate slope, the midpoint, and negative reciprocal so that they can write an equation of a perpendicular bisector. This video is appropriate for a student taking a course in Geometry.

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A triangle has three sides, three angles, and the three angles add up to 180.

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The sum of the lengths of any two sides of a triangle  greater than the length of the third side.