Representing 3D in 2D Quiz - ICSE Class 8 Mathematics

Free practice quiz: Representing 3D in 2D (ICSE Class 8 Mathematics). 21 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 8 Mathematics practice quiz has 21 multiple-choice questions on Representing 3D in 2D, and 21 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. A triangular prism has how many faces?

   1. 5
   2. 6
   3. 7
   4. 8
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   Answer: A. 5

   A triangular prism has two triangular bases and three rectangular faces connecting them. Therefore, it has a total of 2 + 3 = 5 faces.

2. Which of the following nets is NOT a valid net for a square pyramid?

   1. A square with four triangles attached to its sides.
   2. A net formed by unfolding the pyramid such that the base is in the center and four triangles radiate outwards.
   3. A net consisting of five identical squares arranged in a 'plus' sign shape.
   4. A net consisting of a square and four triangles attached to the sides of the square.
   Show answer

   Answer: C. A net consisting of five identical squares arranged in a 'plus' sign shape.

   A square pyramid has one square base and four triangular faces. The first three options represent valid nets. A net of five identical squares arranged in a 'plus' sign shape would form a cube (if the squares were arranged correctly in a net) or an open box, not a pyramid.

3. How many edges does a cube have?

   1. 8
   2. 10
   3. 12
   4. 16
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   Answer: C. 12

   A cube has 12 edges. These are the lines where the square faces meet. It has 8 vertices (corners) and 6 faces.

4. Which of these nets can be folded to form a triangular pyramid (tetrahedron)?

   1. A net with four identical squares.
   2. A net with three triangles in a row and one attached to the middle one.
   3. A net with four triangles, where three form a larger triangle and the fourth is attached to one side.
   4. A net with a rectangle and three triangles.
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   Answer: C. A net with four triangles, where three form a larger triangle and the fourth is attached to one side.

   A tetrahedron has four triangular faces. A common net consists of three triangles arranged to form a larger triangle (representing the base and two sides), with the fourth triangle attached to one edge to form the apex when folded.

5. How many faces does a regular octahedron have?

   1. 6
   2. 8
   3. 10
   4. 12
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   Answer: B. 8

   A regular octahedron is a Platonic solid composed of 8 equilateral triangular faces. Its name derives from the Greek word 'okto' meaning eight.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which of these nets, when folded, will create a closed cylinder?
2. How many faces does a regular icosahedron have?
3. What is the top view of a rectangular prism?
4. How many vertices does a triangular prism have?
5. What is the side view of a cone?
6. Which net would NOT form a hexagonal prism?
7. What is the front view of a cylinder?
8. How many faces does a regular dodecahedron have?
9. What is the top view of a triangular prism?
10. How many vertices does a pentagonal pyramid have?
11. What is the side view of a square pyramid?
12. Which of the following nets will NOT form a cube?
13. What is the side view of a cuboid?
14. Which net can be folded to form a cone?
15. How many vertices does a hexagonal pyramid have?
16. Which of the following nets cannot form a cube?

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