Question

if ∆ abc acd is exterior angle ab= ac , acd = 120 degree find angle a ???????​
plzzz answer fastly

Answer 1

Answer:answer is 60 degree

Step-by-step explanation: Its because AB=AC, so the triangle is isoceles triangle and angle opposite to the equal sides are also equal. So angle ACD and angle ACB = 180 degree and so Angle C= 60 degree. So angle B is also equal. And so the thir side A is also same and so the triangle is also equilateral triangle.

Hope it helps!!!!!!