Question

If a triangle has angle measurements of 15 degrees and 90 degrees what is the measure of the third angle

Answer 1

The sum of the 3 angles of a triangle is 180. You’re given the angle measure of 90, 180-90=90. You’re also given a measure of 15, 90-15=75. the third and last angle of that triangle has a measure of 75 degrees

Answer 2

180 is the total for any triangle, therefore if you take 180-90-15, you’ll get 75 remaining; 75 being your third angle.