Question

no spam I will report​

Answer 1

I think this is reflected angle or straight angle

Answer 2

Given: PQ || RS
QR || TS

To Find: ∠a

:- In the given figure,
∠PQR + ∠x = 180° ( Linear Pairs)
85° + ∠x = 180°
∠x = 180° - 85°
∠x = 75°

As, PQ || RS & QR || TS

∠x = ∠a ( Corresponding Angles)

∠a = 75°

Hence, ∠a is 75°

*Refer to the image*