B.) 20°

C.) 30°

D.) 36°

E.) 40°

Angles of a triangle add up to 180°

5x + 3x + 2x = 180 {added angles and set equal to 180}

10x = 180 {combined like terms}

x = 18 {divided both sides by 10}

2x is the smallest angle

= 2(18) {substituted 18, in for x, into 2x}

= 36° {multiplied}

**D.) 36°**

*- Algebra House*