In the given figure, l ||m in and a transversal I cuts them. If ∠1:∠2=2:3, find the measure of each of the marked angles.
In the given figure, line p is parallel to the line q. Line l and line m are transversals. Measures of some angles are shown. Find the measures of ∠a and ∠c .
Find the measure of ∠P and ∠S if SP || RQ. (If you find m∠R , is there more than one method to find m∠P ?