Question

i have a doubt in this ​

Answer 1

Answer:

one third of right angle=30(90/3=30)

so n is 30 degree greater

Let COB be X

we know angle AOC and COB is 180*

So X+(X+30)=180

2X+30=180

2X=150

X=75 degree

X=y=75 degree

now n 30 degree greater

so 75+30=105 degree

y=75 degree

n=105 degree

Answer 2

Given :-

x = y + 90°/3 -------(1)

As per figure above it can be concluded that,

x + y = 180°

y + 30° + y = 180°

2y = 150°

$\bf{y\:=\:75°}$

And putting the value of y in equation (1)

x = 75° + 30°

$\bf{x\:=\:105°}$