3D Shapes Introduction — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A basketball is shaped like a sphere.
Basketballs are spheres because they are round in every direction.
2. A wooden block is often a cube.
Toy blocks are cubes when all six square faces match in size.
3. A traffic cone looks like a cone.
Traffic cones have a circle base and rise to a single pointed top.
4. A paper towel roll is a cylinder.
Paper towel rolls are cylinders with curved sides and two circle ends.
5. A circle is a 2D shape, not 3D.
A circle is flat and 2D, while a sphere is round and 3D.
6. A solid shape that takes up space is 3D.
3D shapes have length, width, and height so we can hold them.
7. A face is the flat side of a 3D shape.
A face is any flat surface on a solid shape like a cube side.
8. A edge is where two faces meet on a shape.
An edge is the straight line where two flat faces of a solid meet.
9. A vertex is a sharp corner of a 3D shape.
A vertex is a corner point where edges meet on a solid shape.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Sphere
→ Beach ball
Beach ball
Cube
→ Sugar block
Sugar block
Cone
→ Party hat
Party hat
Cylinder
→ Soup can
Soup can
Real items match shapes: balls are spheres, blocks are cubes, hats are cones, cans are cylinders.