Look at the picture.
Corresponding angles:
∠1 and ∠5
∠2 and ∠6
∠3 and ∠7
∠4 and ∠8
Answer:
n = -2 .................
180-(4a+32)=48-4a
(142-4a)+39+(a+41)=180
-4a+a=180-142-39-41
-3a= -48
a=-48/-3
a=16
well if it's a 50% off sale then $4