Question

Q.13 : Angles a and b form a linear pair of angles and a - 2b = 30 , then the value of <a and <b are : *

a.130 , 50

b.120 , 40

c.110 , 30

d.100 , 20

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Answer 1

Answer:

a

Step-by-step explanation:

The sum of linear angles is 180°

so ,a+b=180°

a=180-b

Substituting the above equation in the given,

a-2b=30------(given)

180-b-2b=30

-3b=30-180

-3b=-150

b=50

a=180-b

a=180-50=130

a=130,b=50