Problem Solving

This is a GRE math question, but I heard I can get help here! Thanks in advance!

I do understand you can assume nothing from the diagrams. My question is on the principles.

Here is the question which I've inserted in three photos
part 1: https://docs.google.com/file/d/0B8G2...it?usp=sharing

part 2: https://docs.google.com/file/d/0B8G2...it?usp=sharing

part 3: https://docs.google.com/file/d/0B8G2...it?usp=sharing

My answer would have easily been C - that m and n are equal (the answer is D). I didn't assume that based on the pic. I assumed that because line AD and DC are equal. I thought that equal-sized lines had equal-sized angles. I'm getting this from all the rules on triangles and angles. For instance here:

https://docs.google.com/file/d/0B8G2...it?usp=sharing

Can anyone help me get this straight in my head? I feel like a lot of this stuff is just memorization, but I'd like to make valid connections.

atlcharm wrote:This is a GRE math question, but I heard I can get help here! Thanks in advance!

I do understand you can assume nothing from the diagrams. My question is on the principles.

Here is the question which I've inserted in three photos
part 1: https://docs.google.com/file/d/0B8G2...it?usp=sharing

part 2: https://docs.google.com/file/d/0B8G2...it?usp=sharing

part 3: https://docs.google.com/file/d/0B8G2...it?usp=sharing

My answer would have easily been C - that m and n are equal (the answer is D). I didn't assume that based on the pic. I assumed that because line AD and DC are equal. I thought that equal-sized lines had equal-sized angles. I'm getting this from all the rules on triangles and angles. For instance here:

https://docs.google.com/file/d/0B8G2...it?usp=sharing

Can anyone help me get this straight in my head? I feel like a lot of this stuff is just memorization, but I'd like to make valid connections.

Hi,

I don't think it is a nice idea to share files publicly from your google drive. Instead you could post the image or can copy paste the image from the file. Also people who don't have an account can't see this!

Hope it helps!

atlcharm wrote:This is a GRE math question, but I heard I can get help here! Thanks in advance!

I do understand you can assume nothing from the diagrams. My question is on the principles.

Here is the question which I've inserted in three photos
part 1: https://docs.google.com/file/d/0B8G2...it?usp=sharing

part 2: https://docs.google.com/file/d/0B8G2...it?usp=sharing

part 3: https://docs.google.com/file/d/0B8G2...it?usp=sharing

My answer would have easily been C - that m and n are equal (the answer is D). I didn't assume that based on the pic. I assumed that because line AD and DC are equal. I thought that equal-sized lines had equal-sized angles. I'm getting this from all the rules on triangles and angles. For instance here:

https://docs.google.com/file/d/0B8G2...it?usp=sharing

Can anyone help me get this straight in my head? I feel like a lot of this stuff is just memorization, but I'd like to make valid connections.

Could you give some other link?
The one you have given doesn't open.

Cheers