In the image we can see that:
- Lines c and a are transversal.
- Lines c and b are transversal.
Which lines are transversal?
Two lines are transversal if the lines intercept and the angles formed are not of 90°.
Two lines are perpendicular if the angles formed are of 90°.
Two lines are parallel if never intercept.
In the given diagram we can see that a and b are parallel lines, because they never intercept.
But we can see that
Line c intercepts a.
Line c intercepts b.
So:
Lines c and a are transversal.
Lines c and b are transversal.