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Aptitude Question ID : 93489

The side BC of a triangle ABC is extended to D. If ∠ACD = 120° and ∠ABC ∠CAB, then the value of ∠ABC is: [A]20° [B]80° [C]40° [D]60° Show Answer 40° ∠CAB = 2 ∠ABC ∠ACB + ∠ACD = 180° = ∠ACB + 120° = 180° = ∠ACB = 180° – 120° = 60° ∴ […]