Question

In figure, ∆ACD is an exterior angle of ∆ABC. ∠B = 40°, ∠A = 80°. Find the measure of ∠ACD *​

Answer 1

Answer:

we know that exterior angle is the sum of opposite interior angle so answer is 40°+80°=120°

Answer 2

Answer:

120 degree

Step-by-step explanation:

<acd= <a+<b (exterior angle property)

=<ACD=40+80=120 DEGREE