Math proofs please help?

i need help with these math proofs please.. thanks so much if anyone can help..





here is what i'm looking at.. http://i12.tinypic.com/712nipi.jpg





What should replace (a) in the proof?


A) ab= cb


B)ad = dc


C) bd = ac


D)ac = ac





What should replace (b) in the proof?





A)Midpoint


B)Perpendicular lines


C)Right angles


D)Right Triangles





What should replace (c) in the proof?





A) Definition of Perpendicular lines


B) Definition of Right angles


C) Definition of Midpoint


D) Definition of Right triangles





What should replace (d) in the proof?


A) ac = ac


B) ab = ab


C) bc = bc


D) bd = bd





What should replace (e) in the proof?





A) SSA Postulate


B) SSS Postulate


C) LL Theorem


D) HL Theorem

Math proofs please help?
1. b


2. c


3. a


4. d


5. c





this is my all-time favorite geometery lesson =) i love this =)
Reply:1. B


2.C


3. B





Not sure of the rest