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Triangle Angle Bisector Theorem - YourTeacher.com - Math Help

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Uploaded by on May 13, 2008

For a complete lesson on the triangle angle bisector theorem, go to http://www.yourteacher.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. If a line is parallel to a side of a triangle, and it intersects the other two sides of the triangle, then it divides these sides proportionally (Triangle Proportionality Theorem). If three parallel lines intersect two transversals, then they divide the transversals proportionally (Corollary of the Triangle Proportionality Theorem). If a ray bisects an angle of a triangle, then it divides the opposite side of the triangle into segments that are proportional to the other two sides (Triangle Angle-Bisector Theorem). Students are then asked to solve problems related to these theorems using Algebra.

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  • stop being rude to someone who wish to gives you a knowledge

  • Ahhh! I LOVE these videos. I'm home schooled and NOBODY in my family knows anything about math, so whenever I need help I immediately go to these. These videos help so much. :)

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  • SO MUCH BETTER THAN MY MATH TEACHER, STUPID MR QUAZZA!!

  • The smile at the end creeps me out. It reminds me of this girl named Latiesha, and she sits in class and smiles for eons.

  • really helpful videos! they are helping me out so much for reviewing for finals!

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    btw, digging the smile at the end lolol

  • @sanillaInkheart SATs? year 6 exams?

  • thank you so much!!! I understood everything i learned in this geometry chapter but then i suddenly got confused and now i know why!!!! thanks to you I understand it again. i hope i get another A, i dont wanna go down...

  • I need a calculator..

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  • @hannah0022

    i want to be homeschooled!

  • @hannah0022

    T_T ur so lucky for being home schooled

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