- A280
- B125
- C140
- D155
Step-by-Step Solution
Exterior angle ACD = sum of interior opposite angles = angle A + angle B = 60 + 80 = 140°.
Answer: C) 140
Triangle ABC has angle A = 60° and angle B = 80°. Side BC is produced to D.
Find the exterior angle ACD.
Class 9Angle Sum of a TriangleGeometry — Lines and Angles
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