Question

Which of the following angles can form acute angle triangle?

1. 50°, 60°, 70°
2. 30°, 60°, 90°
3. 30°, 30°, 120°
4. None of these

Answer 1

Correct Answer - Option 1 : 50°, 60°, 70°

Concept:

In an acute angle triangle, each angle muct be less than 90°.

Calculation:

Let the three angles of a triangle be a, b and c

For being acute angle triangle a < 90°, b < 90° and c < 90°

And also the sum of 50°, 60°, and 70° is 180° 

∴ 50°, 60°, 70° can form an acute angle triangle