- A68°
- B65°
- C18°
- D162°
Step-by-Step Solution
∠XZW = ∠X + ∠Y, so ∠Y = 115° − 47° = 68°. (18° comes from 65° − 47°, mixing up the interior angle at Z.)
Answer: A) 68°
In △XYZ, ∠X = 47° and side YZ is produced to W so that ∠XZW = 115°. Find ∠Y.
Class 9Exterior Angle of a TriangleGeometry — Lines and Angles
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