How well do you know Triangles?

1. If a triangle has sides of 2cm, 3cm, 4cm, what is the type of triangle?

Equilateral Isoceles Scalene

2. If a triangle has 2 sides with equal lengths and 60° angle between them. What is the type of triangle?

Equilateral Isoceles Both

3. The perimeter of an equilateral triangle is 15cm. What is the length of one side?

15cm 30cm 5cm

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

yes no

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

yes no

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

yes no

7. There is a triangle XYZ where XY is perpendicular to YZ and angle X = 70 degrees. What is the measure of angle Z?

120deg 20deg 110deg 30deg

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

45deg 60deg 65deg 95deg

9. If a triangle has 2 angles of 75 degrees. What is the measure of third angle in degree?

25 30 15

10. A right triangle ABC is given where angle B = 90 degrees.
Which side of the triangle is the longest?

side AB side BC side CA None