2D and 3D Shapes — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A cube has 12 edges.
A cube has 12 edges, which are the line segments where two faces meet.
2. A 3D shape with a circle face and a point on top is a cone.
A cone has a circular base and comes to a single point (apex) at the top.
3. A cube has 5 more faces than a cone.
A cube has 6 faces and a cone has 1 face, so 6 minus 1 equals 5 more faces.
4. A can of soup is shaped like a cylinder.
A soup can has 2 circular flat faces and a curved surface, just like a cylinder.
5. A shape with 5 sides and 5 corners is called a pentagon.
A pentagon is a 2D shape with exactly 5 sides and 5 corners.
6. A rectangular prism has 6 faces.
A rectangular prism has 6 rectangular faces: top, bottom, front, back, and two sides.
7. A triangle has 3 fewer sides than a hexagon.
A hexagon has 6 sides and a triangle has 3 sides, so 6 minus 3 equals 3 fewer sides.
8. A basketball is shaped like a sphere.
A basketball is round in every direction, just like a sphere.
9. A square has 4 vertices.
A square has 4 vertices, one at each corner where two sides meet.
Part B: Match
Draw a line from each shape to its attribute.
1. Match each shape to its attribute.
Circle
→ 0 corners
6 faces
Cube
→ 6 faces
3 sides
Triangle
→ 3 sides
2 flat faces
Cylinder
→ 2 flat faces
0 corners
A circle has 0 corners because it is round. A cube has 6 square faces. A triangle has 3 straight sides. A cylinder has 2 flat circular faces on the top and bottom.