Bisector Theorems

In this lesson I will be teaching you various bisector theorems.  As I suggested in the previous lesson you really want to make constructions of these triangle theorems as it’s a great way to experience the concepts in real life.  My lesson will explore angle and perpendicular bisectors theorems.  Just as the name implies an angle bisector is a ray that “bisects” or cuts an angle measure in half.  For example an angle bisectors of a 60 degree angle would cut and form two 30 degree angles- you will see this clearly demonstrated in the lesson.  Now a perpendicular bisector “cuts” a line segment in half.  The key concept about a perpendicular bisector is that it bisects another line “perpendicularly” meaning at  a right angle (90 degrees).  If your a little confused don’t worry the video will show this much more clearly.  As I was saying don’t forget to create constructions on the theorems and properties we cover- it’s a great way to understand and retain the concepts.  Lastly keep reviewing your notes as geometry builds on itself.  Have you done any algebra problems lately?  You should- remember there is algebra in geometry and you should be reviewing algebra as well.  Good luck!

TabletClass Math Triangles Bisectors Theorems Lesson from John Zimmerman on Vimeo.

If You Like The Videos On This Site Then Take A Free Trial With My Full Homeschool Math Program Now: