A number used in the mathematical operation of addition (e.g., 6 + 8 = 14, ... K-5 Definitions of Math Terms. 15 remainder. The number left over is 14-16
First look at the given numbers, especially 123 degrees which if you add up the other side it equals 180 degrees so: 180-123= 57 Ok now you know two sides of the triangle and you know that all the 3 sides add up to 360 degrees so: 57+75= 132 180-132= 48