In triangle ABC, angle = 62 °, and angle A is 20 ° less than angle C. Find the degree measure of angle A.

1. Let’s say the angle C is equal to x degrees.

2. Then the angle A will be (x – 20) degrees.

3. Let’s compose the equation and determine the degree measure of the angle C.

62 + x + x – 20 = 180;

2x = 180 – 62 + 20 = 138;

x = 138/2 = 69;

x = 69 °.

4. Find out how many degrees the angle A.

69 – 20 = 49 °.

Answer: 49 °.