1. What is a triangle called if all its angles are acute angles?

2. What is a triangle called if one angle is a right angle?

3. What is a triangle with one obtuse angle called?

4. What is a triangle called if lengths of all three sides are equal?

5. What is a triangle called if lengths of two sides are equal?

6. What is a triangle with all three sides of different lengths called?

7. What is the type of triangle if in ∆ RST, seg RS and seg ST have equal lengths?

8. What is the type of triangle if all sides of ∆ RTO are of equal length?

9. What is the type of triangle if the sides of ∆ DEF are 5.3 cm, 4.2 cm and 6.6 cm in length?