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Answer:
100°
Step-by-step explanation:
In triangle ABC
Angle A = 50°
Angle B = 70°
Angle C = 180°- (Angle A + Angle B)
= 180° - (50°+70°)
= 180° -120°
= 60°
(As sum of all angles of triangle is 180°)
Angle ACD = 60°/2 = 30°
(CD is the bisector of Angle C)
Angle ADC = 180° - (Angle A + Angle C)
= 180° - (50° + 30°)
= 180°- 80°
=100°
Therefore, Angle ADC = 100°
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