Question

if y=20° ,prove that the line aob is straight line

Answer 1

Well, Your figure holds your answer.....
Note, a straight line has 180 degree angle at any point.......<--- at least that's what maths says.......Lol.
So, proving that ∠AOB = 180° would suffice.....
Now,
The complete ∠O is 8y + 4x = 360°
Substituting values for y, we have x=(360° - 160°)/4 = 50°
Now,
∠AOB = 2y + 3x - 10° = 40° + 150° - 10° = 180°.........

There you go...... Hope it satisfies you....
Enjoy your time at Brainly and keep asking.....We're always at ur service 

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Answer 2

Answer:

Step-by-step explanation:

Well, Your figure holds your answer.....

Note, a straight line has 180 degree angle at any point.......<--- at least that's what maths says.......Lol.

So, proving that ∠AOB = 180° would suffice.....

Now,

The complete ∠O is 8y + 4x = 360°

Substituting values for y, we have x=(360° - 160°)/4 = 50°

Now,

∠AOB = 2y + 3x - 10° = 40° + 150° - 10° = 180°.........

There you go...... Hope it satisfies you....

Enjoy your time at Brainly and keep asking.....We're always at ur service 

Pls brainliest