Question

Two adjacent angles of a rhombus are 3x - 40° and 2x + 20°. The measurement of the greater angle is : (a) 160° (b) 100° (c) 80° (d) 120°

Answer 1

Answer:

option b. 100°

Step-by-step explanation:

3x - 40° + 2x + 20°= 180°

=>5x-20°= 180°

=>5x= 180°+20°

=>5x= 200°

=>x= 40°

•now,

3x - 40°= (3×40°) - 40°=120°- 40°= 80°

2x + 20°= (2×40°) + 20° = 80°+20°= 100°