Find adjacent corners if one is half the size of the other.

The solution of the problem:
Adjacent angles are angles that add up to 180 degrees.
1. One of the adjacent angles is x degrees.
2. Find what the other adjacent angle is equal to.
x * 2 = 2x degrees.
3. Let’s compose and solve the equation.
x + 2x = 180;
3x = 180;
x = 180/3;
x = 60;
4. One of the adjacent angles is x = 60 degrees.
5. Find what is the second adjacent angle.
x * 2 = 60 * 2 = 120 degrees.
Answer: One of the adjacent angles is sixty degrees, the other adjacent angle is one hundred and twenty degrees.