Primary 4 Mathematics · Chapter 13 · Answers and explanations
Lesson 13.2: Prisms and Pyramids (answers)
Section A · Multiple choice 4 marks
1. Which solid is a prism?1 mark
(A) Solid A(B) Solid B(C) Solid C(D) None of them
Answer: (B) Solid BSolid B has two identical triangles at its ends, so it is a prism.
2. Which solid is a pyramid?1 mark
(A) Solid A(B) Solid B(C) Solid C(D) None of them
Answer: (C) Solid CSolid C has a square base and triangles that meet at the top.
3. The two ends of a triangular prism are shaped like...1 mark
(A) squares(B) triangles(C) rectangles(D) circles
Answer: (B) trianglesThe two identical faces at the ends are triangles.
4. Which solid is NOT a prism?1 mark
(A) cube(B) cuboid(C) cone(D) triangular prism
Answer: (C) coneA cone has no pair of identical faces at its ends.
Section B · Write your answer 11 marks
5. What is the shape of the base of this pyramid?1 mark
Answer: squareThe pyramid sits on a square face.
6. What shape are the slanted faces of this pyramid?1 mark
Answer: trianglesThe slanted faces meet at a point, so they are triangles.
7. Is a cuboid a prism? Write yes or no.1 mark
Answer: YesA cuboid has two identical rectangles at opposite ends.
8. Is this solid a prism or a pyramid?1 mark
Answer: pyramidIt has a pentagon base and triangles that meet at the top.
9. Is this solid a prism or a pyramid?1 mark
Answer: prismIt has two identical pentagons at its ends.
10. Write prism or pyramid for each solid: (a) cube (b) square pyramid.2 marks
Answer: (a) prism (b) pyramidA cube has two identical square ends. A square pyramid has one base and triangles meeting at a vertex.
11. Which of these is not a prism: cuboid, triangular prism, cone, cube? Give a reason.2 marks
Answer: cone; it has no pair of identical faces at opposite endsA prism has two identical faces at opposite ends. A cone does not.
12. Write one way a pyramid is different from a prism.2 marks
Answer: A pyramid has one base and triangular faces that meet at a vertex. A prism has two identical faces at opposite ends.Any correct difference is accepted.
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