ABC is a triangle in which AB = AC. The base BC is produced to Dand ZACD = 130°, then ZA is equal to (a) 409 (b) 50 (C) 60 (d) 80
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ANSWER:
given that angle ACD = 130°,
then ACB = 50° and angle ABC is also 50°.
So,by angle sum property of triangle Acute angle A=80°
answer: Angle A = 80°
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