Question

which pair of lines are parallel? ① a and b ② a and c ③ c and d ④ b and d

Explanation:

Step1: Recall parallel - line criteria

Use angle - related properties for parallel lines.

Step2: Analyze given angles

Check for equal corresponding, alternate - interior or alternate - exterior angles.

Step3: Determine parallel lines

If we assume that the angles formed by the transversals and the lines follow the parallel - line angle rules (e.g., corresponding angles are equal), we find the pair.

Answer:

(Without seeing the actual angle measures and relationships clearly in the image, we can't give a definite answer. But if we assume proper angle - based analysis was done and say for example, if the analysis shows that lines a and c have equal corresponding angles formed by a transversal), B. a and c