If the angles are supplementary, that means that the sum of the two angles is 180 degrees. Make one angle "x." The other angle is 10 more than 3 times "x". When both "x" and 10 more than 3 times "x" are added together, their sum is 180 degrees...

Most recently, I was working with a student on the angles in a triangle. We started with a circle to show the angles all the way around, their sizes, and how they compare to each other. Then, I set my arms hand to elbow in an L shape. We worked on showing
the sizes of various angles by moving my hand at 12-o'clock (90 degrees) to a position that would show the angle size...
read more