📚 Topic Summary
In geometry, three-dimensional (3D) shapes have length, width, and height, setting them apart from two-dimensional shapes. To analyze 3D shapes, we identify key components: faces (flat surfaces), edges (lines where faces meet), and vertices (points where edges meet). Understanding these elements helps us describe and classify different 3D shapes.
This worksheet will help you identify and count the number of faces, edges, and vertices of common 3D shapes. Let's get started!
🧮 Part A: Vocabulary
Match the terms with their definitions:
- Face
- Edge
- Vertex
- Cube
- Pyramid
Definitions:
- A solid 3D shape with six square faces.
- A point where edges meet.
- A flat surface of a 3D shape.
- A 3D shape with a polygonal base and triangular faces that meet at a common vertex.
- A line segment where two faces meet.
| Term |
Definition (Letter) |
| Face |
|
| Edge |
|
| Vertex |
|
| Cube |
|
| Pyramid |
|
✍️ Part B: Fill in the Blanks
Complete the following paragraph using the words: vertices, edges, faces, shape, three-dimensional.
A __________ object has length, width, and height. To understand its structure, we need to identify its __________, __________, and __________. Each of these components contributes to the overall __________ of the object.
🤔 Part C: Critical Thinking
Explain in your own words how identifying the number of faces, edges, and vertices can help you distinguish between a prism and a pyramid.