Wednesday, September 15, 2010

Wednesday, September 15

Today in class we spent a lot of time going over proofs, which were last night's homework and we didn't have much time to go over the new lesson, but we did learn 3 new definitions from section 1.5.
Bisect: when a point, segment, ray, or line divides a segment into two congruent segments

In this picture, line segment CD bisects angle ACB



Trisect: when two points, segments, rays, or lines divide a segment into three congruent segments.


In this picture, the two dotted lines are trisecting the angle.



Midpoint: a point in the center of a line, the bisection point of a line




In this picture, point C is the midpoint of segment AB

So that's basically what we learned today in class.

-Olivia R

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