**Answer:**

144°

**Step-by-step explanation:**

Let x be the smaller angle of two supplementary angles

x = smaller angle

4x = larger angle

4x + x = 180°

5x = 180°

x = 180°/5°

x = 36°

4x = 4(36)

**= 144**°

6 sec read

**Answer:**

144°

**Step-by-step explanation:**

Let x be the smaller angle of two supplementary angles

x = smaller angle

4x = larger angle

4x + x = 180°

5x = 180°

x = 180°/5°

x = 36°

4x = 4(36)

**= 144**°