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1. The second angle of a right triangle is 30°. Then what is the third angle?
- A. 50°
- B. 50°
- C. 50°
- D. 50°
Answer: Option B
Explanation:
The sum of angles of a triangle = 180∘.
Given: One angle is 90∘(since it is a right angled triangle ) and another angle is 30∘
Hence, 90∘+30∘+Third angle=180∘
⇒120∘+Third angle=180∘
∴Third angle=180∘−120∘=60
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