Geometry proofs please help!!!?

WHO CAN ASSIST ME IN SOLVING A PROOF????SOMEONE THAT HAS A BOOK FOR GEOMETRY SO YOU CAN LOOK AT THE PROBLEM..????
Update: ITS THE CHALLENGE FOR CHAPTER 4 LESSON 1.......
Update 2: ITS THE MCDOUGALLITEL BOOK.....I THINK ITS THE 2004 VERSION.....THE PROBLEM IS IN CHAPTER 4 LESSON 1......ITS THE CHALLENGE
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