Two column proofs Problem: mLA=mLS, and mLS=mLK, than below this is shows mLA=mLK.

Question

I dont understand two column proofs at all. One of my problems is name the property of equality or congruence that justifies going from the first statement to the second statement. The problem is: mLA= mLS and mLS= mLK than below this it shows mLA= mLK. I'm not understanding it. The example has a picture but this problem don't. Help!

Answer 1

1. m<A=m<S          1. Given

2. m<S =m<K          2. Given

3. m<A =m<K           3. Transitive Prop. of Equality

Answer 2

m - 2/6 = 3m +1/3

Answer 3

Given: YZ is congruent to WZ, YX is parallel to ZW

Prove triangle YXZ is congruent to triangle WZX.

I Know The Given, I Just Don't Know Why WX is congruent to XW

Answer 4

1. m<A=m<S          1. Given

2. m<S =m<K         2. Given

3. m<A =m<K         3. Transitive Prop. of Equality

Answer 5

So if A=S, S=K we can say, also A=K

So you can proof this like that,

If m<A=m<S and m<S=m<K, then m<A=m<K