Quiz on triangles

1. Which of the following triangles are always similar?

Right triangle
Obtuse triangle
Equilateral triangle
Isoceles triangle

2. What is the third angle for the triangle where angle1 = 45° and angle2 = 45°?

45° 90° 60°

3. A triangle can have

one right angle two right angles

4. Which of the following can form a right angled triangle?

14, 15, 26 12, 16, 20

5. Which of the following triangles are always similar?

Equilateral triangle Isosceles triangle

6. A scalene triangle has ___ lines of symmetry

two 0 15

7. The perimeter of scalene triangle with sides a, b, c is

a + b + c 2a None of these

8. There is a right triangle PQR where: angle Q = 90°; angle P = angle R. What is the measure of angles P and R?

85° 65° 45°

9. If the largest angle in a triangle is 70°, what is the least possible value of the smallest angle of the triangle?

30° 10° None

10. If one angle of a triangle is obtuse, then which one of the following is the possible measure of remaining angles?

100° 85°