Question

pls help I need step by step expanation​

Answer 1

let x+y be a

let y+z be b

and a=b

we can see a complete angle here,

a+b=360 degree

2a=360      (a=b)

a=360/2

a=180

b=180

as angAOB is a straight angle, AOB is a line

Pls mark as brainliest(as you get 25% of the pts if u do)

Answer 2

Answer:

in a straight line sum of angles=180

hence proved

hope you understand