Answer:
55 degrees
Step-by-step explanation:
Hi there!
The sum of the interior angles of a triangle is always 180 degrees.
We can solve for the interior angles at the bottom by subtracting both 135 and 100 from 180 (because straight lines have a measure of 180 degrees too):
180-135 = 45 degrees
180-100 = 80 degrees
Now, to solve for the final angle at the top, subtract 80 and 45 degrees from 180:
180-80-45 = 55 degrees
This angle at the top measuring 55 degrees is the opposite angle of x. Opposite angles are always congruent, so therefore, x measures 55 degrees.
I hope this helps!
