3D Shapes Introduction — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. How many flat faces does a cube have?
A) 6
B) 4
C) 8
D) 12
A cube has 6 flat square faces, one on top, bottom, and four sides.
2. Which 3D shape has zero flat faces?
A) Cube
B) Sphere
C) Cone
D) Cylinder
A sphere has zero flat faces; it is fully curved like a ball or globe.
3. How many circle faces does a cylinder have?
A) 0
B) 1
C) 2
D) 3
A cylinder has 2 circle faces, one on the top and one on the bottom.
4. Which shape has 1 circle face and 1 vertex?
A) Sphere
B) Cube
C) Cylinder
D) Cone
A cone has 1 circle face at the bottom and 1 pointy vertex on top.
Part B: Fill in the Blank
Write the correct answer on each line.
1. Sam stacks 3 cubes. He sees 3 flat faces on top.
Three stacked cubes show three top faces, one for each cube on top.
2. A cube has 8 corners called vertices.
A cube has 8 vertices, one at each pointy corner where edges meet.
3. A cube has 12 edges where faces meet.
A cube has 12 edges, four on top, four on bottom, four going up.
4. A sphere can roll because it has no edges.
A sphere has no edges or flat faces, so it rolls in every direction.
5. A cone has 1 vertex at its pointy top.
A cone has exactly 1 vertex, the single sharp point at its top.