Question

match the following to their correct label of 2d or 3d:

column a

1. circle
2. square
3. triangle
4. oval
5. rectangle
6. octagon
7. pentagon
8. hexagon
9. rhombus
10. cylinder
11. cone
12. cube
13. sphere
14. tetrahedron
15. square pyramid
16. rectangular prism
17. octahedron
18. hemisphere

column b
a. 3d
b. 2d

Explanation:

Step1: Recall 2D and 3D shapes

2D shapes have length and width. 3D shapes have length, width, and height (or depth).

Step2: Classify each shape

• Circle: 2D (has length and width - radius related).
• Square: 2D (length and width).
• Triangle: 2D (length and width).
• Oval: 2D (length and width).
• Rectangle: 2D (length and width).
• Octagon: 2D (length and width).
• Pentagon: 2D (length and width).
• Hexagon: 2D (length and width).
• Rhombus: 2D (length and width).
• Cylinder: 3D (height, radius - length, width in circular base).
• Cone: 3D (height, radius - length, width in circular base).
• Cube: 3D (length, width, height).
• Sphere: 3D (radius - but conceptually 3D).
• Tetrahedron: 3D (triangular - based pyramid, 3D).
• Square Pyramid: 3D (base - square (2D) but with height).
• Rectangular Prism: 3D (length, width, height).
• Octahedron: 3D (polyhedron).
• Hemisphere: 3D (half - sphere).

Answer:

1. b
2. b
3. b
4. b
5. b
6. b
7. b
8. b
9. b
10. a
11. a
12. a
13. a
14. a
15. a
16. a
17. a
18. a