Question

three angles on a staight line are 20 40 and ?? find the other

Answer 1

Answer:

hope this helps u

Step-by-step explanation:

unknown angle=x

straight lines

all angle sum = 180

20+40+x=180

x+60=180

x=180-60

x=120

Answer 2

Answer:the other angle is 120

Step-by-step explanation:Bcz here we will put linear pair axiom

Let a angle=x

The angles are 20,40,x

20+40+x=180 (linear pair axiom)

60+x=180

x=180-60

x=120