1. If a triangle has angles 135°, 15°, 30°. Is it an obtuse triangle?

yes no

2. If a triangle has angles 115°, 25°, 40°. Is it an acute triangle?

yes no

3. If a triangle has angles 90°, 60°, 30°. Is it a right angle triangle?

yes no

4. A triangle has angles 60°, 60°, 60°. Is it an equilateral triangle?

yes no

5. If a triangle has angles 25°, 75°, 80°. Is it an acute triangle?

yes no