What is the third angle of a triangle if its other two angles are 55° and 65°?
A50°
B60°
C70°
D80°
Explanation
Sum of angles in a triangle = 180°. Third angle = 180° – (55° + 65°) = 180° – 120° = 60°.
Exam Relevance
- Topic: Geometry & Mensuration
- Subtopic: Triangles
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