Let's do this question, find the value of X in the figure below.
All right, what's the video?
Give it a try and then let's do it together.
All right.
We're back.
I hope you have given it a try.
Over here.
We have X, right?
And that's what we need to find.
Let's mark this angle over here as angle one.
Now you can see that angle, 30 plus 80 plus.
Angle one is equal to 180 degree Y because of the angle some property of a triangle.
Therefore, angle one is equal to 180, minus a hundred and ten, which is equal to 70 degrees.
All right.
Now, over here we have a straight angle.
If you add angle one plus angle X plus 90.
Right.
And we know that a straight angle is equal to 180 degrees.
Therefore, angle one plus X plus 90 equals 180 degrees.
And we know angle one is equal to 70 degrees.
Right.
Therefore, X is equal to 20 degrees.
And that is your answer.