Triangle Quiz

1. Which of the following triangles has one 90 degree angle?

Right Angled Acute Obtuse

2. What do you call a triangle whose sides are all equal?

Equilateral Isosceles Scalene

3. What is the sum of all three angles of a triangle?

270° 180° 360°

4. The side opposite to right angle in right angled triangle is called?

Base Perpendicular Hypotenuse

5. The triangles are said to be............if they are equiangular

Congruent Similar Scalene

6. If a triangle has sides equal to 5cm, 4cm and 6cm, then find its perimeter.

15 cm 11 cm 12 cm

7. What is the area of a trianlge, if base is 4 cm and height is 2 cm?

4 cm^2 5 cm^2 6 cm^2

8. Which of the set of three sides can't form a triangle?

5 cm, 6 cm, 7 cm 5 cm, 8 cm, 15 cm 6 cm, 7 cm, 11 cm

9. In a tirangle ABC, AB + BC = 12 cm, BC + CA = 14 cm and CA + AB = 18 cm. Find the radius of the circle (in cm) which has the same perimeter as the triangle:

5/2 7/2 9/2

10. The angles opposite to equal sides of an Isosceles triangle are

Equal Unequal Complementary angles