Understanding Elementary Shapes

Short Answer Questions(SAQs)

What are the different types of triangles?

The different types of triangles are: equilateral, right isosceles, obtuse isosceles, acute isosceles, right scalene, obtuse scalene and acute scalene.

What is a 3D shape?

3D shapes are shapes with three dimensions, such as width, height and depth. An example of a 3D shape is a prism or a sphere.

What are geometric tools?

Geometric tools are the instruments used to draw different types of geometric shapes.

MCQs

1. How many sides does a pentagon have?

(a) 4

(b) 5

(c) 6

(d) 7

► (b) A pentagon has 5 sides.

2. A triangle having all three sides equal is called:

(a) Scalene triangle

(b) Isosceles triangle

(c) Right triangle

(d) Equilateral triangle

► (d) An equilateral triangle has all sides equal.

3. Which of the following is a 3D shape?

(a) Circle

(b) Square

(c) Sphere

(d) Triangle

► (c) A sphere is a 3D shape.

4. A right angle measures:

(a) 60°

(b) 90°

(c) 120°

(d) 45°

► (b) A right angle is 90°.

5. How many edges does a cube have?

(a) 8

(b) 10

(c) 12

(d) 6

► (c) A cube has 12 edges.

6. Which triangle has one angle greater than 90°?

(a) Right triangle

(b) Acute triangle

(c) Obtuse triangle

(d) Equilateral triangle

► (c) An obtuse triangle has one angle greater than 90°.

7. A straight angle measures:

(a) 90°

(b) 120°

(c) 180°

(d) 360°

► (c) A straight angle measures 180°.

8. Which tool is used to draw a circle?

(a) Divider

(b) Compass

(c) Protractor

(d) Set square

► (b) A compass is used to draw circles.

9. Which shape has no vertices?

(a) Cube

(b) Cylinder

(c) Cone

(d) Sphere

► (d) A sphere has no vertices.

10. A triangle with all angles less than 90° is called:

(a) Right triangle

(b) Acute triangle

(c) Obtuse triangle

(d) Scalene triangle

► (b) An acute triangle has all angles less than 90°.

11. How many faces does a cuboid have?

(a) 4

(b) 5

(c) 6

(d) 8

► (c) A cuboid has 6 faces.

12. Which of the following tools is used to measure angles?

(a) Ruler

(b) Compass

(c) Divider

(d) Protractor

► (d) A protractor is used to measure angles.

13. A triangle with no equal sides is called:

(a) Scalene triangle

(b) Isosceles triangle

(c) Equilateral triangle

(d) Right triangle

► (a) A scalene triangle has no equal sides.

14. Which of these is a polygon?

(a) Circle

(b) Ellipse

(c) Triangle

(d) Sphere

► (c) A triangle is a polygon with 3 sides.

15. A cone has how many faces?

(a) 0

(b) 1

(c) 2

(d) 3

► (b) A cone has 1 circular face and 1 curved surface.

16. What is the measure of a full angle?

(a) 90°

(b) 180°

(c) 270°

(d) 360°

► (d) A full angle is 360°.

17. A shape with six equal faces is a:

(a) Sphere

(b) Cylinder

(c) Cube

(d) Cone

► (c) A cube has six equal square faces.

18. A right triangle has:

(a) One angle more than 90°

(b) Two right angles

(c) One angle equal to 90°

(d) All angles equal

► (c) A right triangle has one angle equal to 90°.