One adjacent corner is 20% of the other. Find these corners.

Let’s designate the degree measure of one of the adjacent angles – x, then the second angle – 0.2x (20% = 0.2). Because the sum of adjacent angles 180 °, we will make the equation:

x + 0.2x = 180;
1.2x = 180;
x = 180: 1.2;
x = 150.

Let’s define the degree measure of the second angle:

150 * 0.2 = 30 °.

Answer: The degree measures of adjacent angles are 30 ° and 150 °.