Question

Please answer all Questions

Answer 1

11) total angle POQ is 180°As it is a straight line so 6x+3x=180°=> 9x=180°=> x=20°. (2) is the correct option.
12) b+a=180°...(1)as AOB is a straight line. b-a =50°...(2) Add (1)and (2)=>2b=230°=> b =115° and 115°+a=180°=> a=180°-115°= 65°. So values of a and b are115°&65°. (c) is the correct option.

Answer 2

ques no 11
as angle POQ= 6x+3x= 180 ( linear pair)
9x= 180
x= 20
in ques no. 12
b-a = 50
and b+a= 180 ( linear pair)
so
b-a= 50
b+a=180
2b= 230
b=115
and
as b+a= 180
so
a= 180-b
a=65



hope it will be helpful!!