Problem 389. Triangle, Parallel lines, Harmonic Mean.
Level: High School, SAT Prep, College geometry. The figure shows a triangle ABC with DE parallel to AB and DF parallel to BC. AE intersects DF at G and CF intersects DE at H. Prove that (1) GH is parallel to AC, and (2) GH is one-half the harmonic mean of AD and CD.
|
Recent Additions
|