Question

In the given figure AB = AC and ACD = 125°. Find A
1) 45 degree
2)55 degree
3)70 degree
4)90 degree​

Answer 1

3) 70 degree

Step-by-step explanation:

As, AB=AC

therefore, angle ABC = angle ACB

=> angle ACB = 180°-125°

= 55°

therefore, A = 180° - (55° + 55°)

= 180° - 110°

= 70°

So, the correct option is (3) 70 degree.