Answer:
At least 4 ways
Step-by-step explanation:
To show that two lines intercepted by a transversal are parallel, it is sufficient to show that:
- same side interior angles are supplementary (100°+80°=180°)
- interior alternate angles are congruent (80°=80°) Or (100°=100°)
- corresponding angles are congruent (80° or 100°)
- exterior alternate angles are congruent (80° or 100°)
We can do each of them in at least one way.
Therefore there is at least four ways
The first choice is correct.
