In the given figure, ∠ ACD is an exterior angle of ∆ ABC. ∠ B = 40°, ∠ A = 70°.

Question 1:

In the given figure, ACD is an exterior angle of ABC. B = 40°A = 70°.

Find the measure of ACD.
 

ANSWER:

In ABC,
∠ACD = ∠A + ∠B   (Exterior angle property)
= 70 + 40          
= 110
Hence, the measure of  ACD is 110​.

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