Triangle Quiz

1. What is a third angle for a triangle where angle1 = 45° and angle2 = 60°?

75° 45° 65°

2. If a triangle has an angle of 90 degrees, what is it called?

Acute angled triangle Obtuse angled triangle Right angled triangle

3. If a triangle has an angle of 120 degrees, what is it called?

Acute angled triangle Obtuse angled triangle Right angled triangle

4. If a triangle has angles 60°, 80°, 40°, what is it called?

Acute angled triangle Obtuse angled triangle Right angled triangle

5. If a triangle has 2 sides equal, what is it called?

Equilateral triangle Isosceles triangle Right angled triangle

6. If a triangle has all sides equal, what is it called?

Right angled triangle Equilateral triangle Isosceles triangle

7. An equilateral triangle has a side a. What is it's perimeter?

√3*a (√3*a)/2 3*a

8. In an isosceles angle, the base angle is 70°. What whould be the vertex angle?

40° 50° 45°