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# Constructing a Triangle Midsegment - Concept

###### Brian McCall

###### Brian McCall

**Univ. of Wisconsin**

J.D. Univ. of Wisconsin Law school

Brian was a geometry teacher through the Teach for America program and started the geometry program at his school

A triangle mid segment is a line segment whose endpoints are the midpoints of a triangle. The **triangle mid segment** is parallel to the third side (the side that does not contain an endpoint). Also, the mid-segment is half the length of the third side.

A mid segment in a triangle, not a trapezoid, we're not going to talk about those right now, is a line segment that connects two midpoints of that triangle. It is similar to a median but it's not exactly the same. The difference between a median and a mid segment is that the mid segment does not contain the vertex as one of your endpoints.

So, if we have a triangle right here and you want to find a median, first thing you're going to have to is find the midpoint of that side. To connect it to the other midpoint you're going to have to find that midpoint and you could connect those and that would be one of your mid segments. There's going to be three mid segments in every triangle. If I find the midpoint of this third side I could connect those two midpoints and that would be a mid segment and I could connect those two points and that would be a mid segment. So every mid segment will be within the triangle and they will be three in every triangle.

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###### Brian McCall

B.S. in Chemical Engineering, University of Wisconsin

J.D. University of Wisconsin Law School (magna cum laude)

He doesn't beat around the bush. His straightforward teaching style is effective and his subtle midwestern accent is engaging. There's never a dull moment with him.

so my teacher can't explain this in 5 weeks but I learn this in less than 3 minutes”

its hard to focus when the teacher is really really really goodlooking”

i like how it took you 3 minutes and 8 seconds to accomplish what my teacher couldn't in 3 days”

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