- Aparallel
- Bintersecting on the left
- Cintersecting on the right
- Dperpendicular
Step-by-Step Solution
When the co-interior angles sum to exactly two right angles (180°), the lines never meet, i.e. they are parallel.
Answer: A) parallel
If the two interior angles on the same side of a transversal add up to exactly 180°, then the two lines are:
Class 9The Fifth PostulateGeometry — Foundations
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