Question

I need help with this problem?

Answer 1

Hi there!

The sum of all th' angles of a triangle is always 180°

Acc'rding to the Question :-
Sum of all the angles in terms of " y " = 180°

⇒ 2y + y + 10° + 50° = 180°

⇒ 3y + 60° = 180°

⇒ 3y = 180° - 60°

⇒ 3y = 120°

⇒ y =
`\frac {120°}{3}` = 40°

Hence,
Option (C.) is Correct.

~ Hope it helps!

Answer 2

Hi there! The answer is B.

The sum of the angles in a triangle is always 180°.

We can also express the sum of the angles in terms of y. The sum will be:

`2y + y + 10 + 50`

Collect the terms.

`3y + 60`

We can now set up and solve an equation.

`3y + 60 = 180`

Subtract 60 from both sides.

`3y = 120`

And finally divide both sides by 3.

`y = (120)/(3) = 40`

Hence, the answer is B.
~ Hope this helps you!