You can put this solution on YOUR website! The sum of the angles of EVERY triangle = 180 degrees
A right triangle is so called because it has a right angle. A right angle, like the letter L, forms a 90 degree angle.
The problem gives you the measurement of one angle:
One angle: 55
Right angle: 90
Total . . . 145
180-140 = 35. Your 3rd angle measure 35 degrees