Respuesta :

yrajkumari
The sum of the angles in a triangle is always 180°.


49 + R + 80 = 180

180-129=51


Now,
We know that line PX = 180° because it’s a straight line


51 +
180+51 = 129

a) is correct

Aisin

Answer:

Step-by-step explanation:

3 angles in a triangle always add up to be 180.
So, angle prq = 180 - 49 - 80 = 51

Angle qrx is supplementary to prq => angle qrx = 180 - 51 = 129

(just answering so the other person can get brainliest)