Question

in triangleABC, angle ACD is the exterior angle measuring 120 degree. if angleB = 30degree. find angleA and angle ACB​

Answer 1

Answer:

Step-by-step explanation:

Angle A+ angle B=angle ACD( exterior angle property)

=>Angle A+30°=120°

=>Angle A=120°-30°

=>Angle A=90°

Now,

Angle ACD+ Angle ACB=180°(linear pair)

=>120°+Angle ACB=180°

=>Angle ACB=180°-120°

=>Angle ACB=60°

Answer 2

Step-by-step explanation:

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