The side BC of a △ABC is extended to D. If a ACD = 120° and a ABC – McqOptions

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1.	The side BC of a △ABC is extended to D. If a ACD = 120° and a ABC= 1/2a CAB, then then value of a ABC is
A.	60°
B.	20°
C.	80°
D.	40°
Answer» E.

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