13

9
Corresponding Angles
M<1 = M<8
70
<2 and <6
lines l and m + by alternate interior angles
12 + using alternate interior angles
<1 and <6 are supplementary
Given
Vertical Angles
Substitution
L ll M
Same Side Interior Angles Converse Theorem
81
70
99

This is totally just for "studying" help and not mean't to be used for others peoples gains

It seems like you have provided a list of numbers and some terms related to angles and lines. If you have any specific questions or need help understanding any concepts, please let me know and I'll be happy to assist you.