Question

in the following figure, if AB=AC and angle ACD =120°,find the value of x​

Answer 1

Answer:

angle ACB+angle ACD=180. ( linear pair)

angle ACB+120=180

angle ACB=60

angle B= angle ACB. (angle opp to equal sides is equal)

angle B=60

angle A + angle B + angle C=180. ( angle sum property)

x+60+60=180

x+120=180

x=60

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