# Help with Solving Geometry Proof

• Mar 12th 2013, 06:36 PM
sandyorn
Help with Solving Geometry Proof

PQ=QR ProvePR=QS ◄--------P-------Q----R--------S--------►

 Statements Reasons PQ=RS Given Q is between PR midpoint R is between QS midpoint PQ=QR QR=RS PQ+QR=QR+RS Segment Addition Postulate (Postulate 1.13) PR=PQ+QR and QS=QR+QS Segment Addition Postulate (Postulate 1.13) PR=QS Substitution Law (Postulate 1.11)

• Mar 12th 2013, 07:56 PM
zhandele
Re: Help with Solving Geometry Proof
Am I missing something? It looks like all you need to do is fill in the two blanks in the second column, and you're actually given that Q is the midpoint of PR and R is the midpoint of QS. That seems to be what the word "midpoint" in the second column (lines two and three) means. If so, what's the definition of midpoint?
• Mar 12th 2013, 08:04 PM
zhandele
Re: Help with Solving Geometry Proof
Am I missing something? It looks like all you need to do is fill in the two blanks in the second column, and you're actually given that Q is the midpoint of PR and R is the midpoint of QS. That seems to be what the word "midpoint" in the second column (lines two and three) means. If so, what's the definition of midpoint?

Sorry, I posted this twice by some mistake, I don't know how to delete the second post.
• Mar 12th 2013, 11:23 PM
sandyorn
Re: Help with Solving Geometry Proof
Thank You,

I just wanted to make sure that I was working in the correct direction. I am sure this geometry stuff is real easy for all of you that reply to these posts, but it's been 29 years since I was in a math class and am trying to do this online. I appreciate the help.

Sandy