Question

In the figure, AB || CD and AD || BC. If
ABC = 110°, ACD = 30°, then find ADC.​

Answer 1

Step-by-step explanation:

An exterior angle of a triangle is equal to the sum of the opposite interior angles.

Hence, In this case ∠A and ∠B

So,

∠A+∠B=140°

as ∠A=∠B

or,2∠A=140°

∠A=∠B=70°