First of all, we know that a line is 180°. This means if we add the angles of 61°, 57°, and angle y, we should get 180<span>°.

Simplify:

Subtract 118° to both sides:

We also know that all three angles of a triangle add up to 180<span>°. So we have:

Simplify:

Subtract 129° to both sides:

</span></span>
Answer:
B?
Step-by-step explanation:
Answer: 15
Step-by-step explanation:
Because u might need it in the real world.
Here's the solution,
The given triangle is a right angled triangle,
So, by Using Trigonometry :
=》

=》

=》

=》

hence, value of x = 6.5 units