See complete Problem 228 at:

gogeometry.com/problem/p228_triangle_midpoint_perpendicular.htm

Level: High School, SAT Prep, College geometry

Post your solutions or ideas in the comments.

## Tuesday, January 20, 2009

### Elearn Geometry Problem 228: Triangle, Midpoint, Exterior line

Subscribe to:
Post Comments (Atom)

We have:

ReplyDeletein the trapezoid AA'B'B : d=(a+b)/2

in the trapezoid BB'C'C : e=(b+c)/2

in the trapezoid AA'C'C : f=(a+c)/2

From this relations we have :

d+e+f=(2a+2b+2c)/2=a+b+c