Question

please answer this question by step

Answer 1

∠SRP = 20 degree
∠ SRP = ∠a (alternate angles)
= 20 degree

∠PRQ = 50 degree
∠PRQ = ∠b ( alternate angles)
= 50 degree

Therefore, ∠a is 20 degree
∠b is 50 degree

Hope it helps ....

Answer 2

if PQ//SR and SP//RQ then PR is the transversal
THEREFORE,
angle b and angle prq are corresponding angles
hence b=50°
AND
angle a and angle SRP are corresponding angles and corresponding angles are equal
hence a=20°