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[andor25]

ALL Matching:
a. Prove: l | | m

1. j||k, m?3 = m?1
2. m?1 = m?2
3. m?2 = m?3
4. l||m

Given
If alternate interior angles are =, then lines are ||.
Substitution
If lines are ||, then corresponding angles are =.


b. Prove: YZ (line over top with arrow pointing right)| | UV(line over top with arrow pointing right)

1. m?1 + m?5 = 180° and m?1 + m?4=180°
2. m?1 + m?5 = m?1 + m?4
3. m?5 = m?4
4. Ray YZ is parallel to Ray UV

Substitution
Given
Subtraction property of equality
If alternate interior angles equal, then lines are ||.

c. Prove: a | | b

1. m?6=m?8, b||c
2. m?7=m?8
3. m?6=m?7
4. a||b

Given
Substitution
If lines ||, corresponding angles =.
If alternate interior angles equal, then lines ||.



Thank you so much if any of you can help. I do school online and I was never fully taught Geometry so I got really confused on these questions. Thank You!!!!