Many thanks to you Loren, and to Subhotosh Kahn for helping me with this problem. I've been working for the past two weeks using 2 different textbooks without success.
I'm sure I will sleep better tonight. Do either of you recommend a book that helps students to learn geometry, especially proofs. I have been using "Geometry for Dummies" by Mark Ryan. This book does emphasize proofs. The other book I used was "Geometry Book I. Planimetry" by A. P. Kiselev. I'll go back to these books to see if either had your explanation and I missed it. It may be my fault, but if you recommend a good learning tool I will try to purchase it. thank you both again, God bless.
Skinski43