$\Delta ABC$ માં,$\angle B = \frac{\angle A + \angle C}{2}$ અને $\angle A : \angle C = 1 : 2$ છે. $\Delta ABC$ ના દરેક ખૂણાનું માપ શોધો.

• A
  $\angle A = 40^{\circ}, \angle B = 60^{\circ}, \angle C = 80^{\circ}$
• B
  $\angle A = 30^{\circ}, \angle B = 60^{\circ}, \angle C = 90^{\circ}$
• C
  $\angle A = 50^{\circ}, \angle B = 60^{\circ}, \angle C = 70^{\circ}$
• D
  $\angle A = 20^{\circ}, \angle B = 60^{\circ}, \angle C = 100^{\circ}$