- A135°
- B60°
- C120°
- D45°
Step-by-Step Solution
Let the interior angle be . Then °, so ° and the exterior angle = 135°.
Answer: A) 135°
An exterior angle of a triangle is three times the interior angle next to it. Find the exterior angle.
Class 9Exterior Angle of a TriangleGeometry — Lines and Angles
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