Home Geometry Problems All Problems Semiperimeter 381-390 View or post a solution 
Problem 385. Triangle, Angle bisector, Perpendicular, Parallel, Semiperimeter. Level: High School, SAT Prep, College geometry.

The figure shows a triangle ABC with angle bisectors AD and CE of angles A and C, respectively. BD is perpendicular to AD and BE is perpendicular to CE. Prove that (1) DE is parallel to AC.
(2) If s is the semiperimeter of triangle ABC, DE = s - b.

Triangle, angle bisectors, perpendiculars, parallel

  Recent Additions