Question

write two reasons to say that X is equals to 60 degrees if a + b is equals to 120 degrees​

Answer 1

Answer:

since its a straight line

a+b+x=180

120+x=180

x=60

Answer 2

Answer:

Step-by-step explanation:

1) Linear pair

2) if a+b is 120 than x will be 180-120=60 only