About 3D Shapes & Nets — Class 6 IB

Identify prisms, pyramids, and cylinders; draw and interpret nets of 3D shapes. This topic is part of the IB Class 6 mathematics syllabus (chapter: Unit 13). On this page you can practice 60 questions across three difficulty levels — 20 easy, 20 medium, and 20 hard — each with a visual step-by-step solution, plus a timed 35-question mastery test with a live leaderboard. Worked examples and sample questions from the topic are below.

3D Shapes & Nets — solved examples for Class 6 IB

Practice questions on 3D Shapes & Nets

1. Q1.easy

   How many edges does a cube have?

   1. A)6
   2. B)8
   3. C)10
   4. D)12
   Show answer

   Answer: 12

   Hint: Count the lines where two faces meet.

2. Q2.easy

   How many vertices does a cube have?

   1. A)4
   2. B)6
   3. C)8
   4. D)12
   Show answer

   Answer: 8

   Hint: Vertices are the corners — count them on top and bottom.

3. Q3.easy

   What 3D shape has a circular base and one curved surface that comes to a point?

   1. A)Cylinder
   2. B)Cone
   3. C)Sphere
   4. D)Pyramid
   Show answer

   Answer: Cone

   Hint: Think of an ice cream cone.

4. Q4.medium

   A hexagonal prism has a regular hexagon as its base. How many faces does it have?

   1. A)6
   2. B)7
   3. C)8
   4. D)12
   Show answer

   Answer: 8

   Hint: A prism has 2 bases plus one rectangular face for each side of the base.

5. Q5.medium

   Which of these arrangements of 6 squares does NOT fold into a cube?

   1. A)A cross shape (t-shape with extra)
   2. B)A straight line of 6 squares
   3. C)An L-shape of 4 with 2 on the side
   4. D)A T-shape with 2 extras
   Show answer

   Answer: A straight line of 6 squares

   Hint: If you try to fold a straight line of 6 squares, two faces would overlap.

6. Q6.medium

   A pentagonal prism has how many edges?

   1. A)10
   2. B)12
   3. C)15
   4. D)20
   Show answer

   Answer: 15

   Hint: For a prism with an n-sided base, the number of edges is 3n.

7. Q7.hard

   A solid has faces that are all equilateral triangles and has 4 faces. What is this shape called?

   1. A)Triangular prism
   2. B)Tetrahedron
   3. C)Octahedron
   4. D)Square pyramid
   Show answer

   Answer: Tetrahedron

   Hint: It's a pyramid made entirely of triangles — even the base is a triangle.

8. Q8.hard

   The surface area of a cube with edge length 5 cm is:

   1. A)$25 \text{ cm}^2$
   2. B)$125 \text{ cm}^2$
   3. C)$150 \text{ cm}^2$
   4. D)$750 \text{ cm}^2$
   Show answer

   Answer: $150 \text{ cm}^2$

   Hint: Surface area of a cube = $6 \times (\text{edge})^2$

9. Q9.hard

   A cuboid has dimensions 8 cm × 5 cm × 3 cm. What is its surface area?

   1. A)$120 \text{ cm}^2$
   2. B)$158 \text{ cm}^2$
   3. C)$240 \text{ cm}^2$
   4. D)$316 \text{ cm}^2$
   Show answer

   Answer: $158 \text{ cm}^2$

   Hint: Surface area = 2(lb + bh + lh) where l, b, h are the dimensions.

These are 9 of the 60 questions available for 3D Shapes & Nets. Start practicing above to unlock visual solutions, AI coaching, and the topic leaderboard — completely free.