Exploring 3D Shapes: Faces, Edges, and Vertices
Exploring 3D Shapes: Faces, Edges, and Vertices
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Exploring 3D Shapes: Faces, Edges, and Vertices
What do you already know about 3D shapes?
Learning Objective
At the end of the lesson you will be able to name and identify faces, edges, and vertices on 3D shapes like cubes, cylinders, spheres, cuboids, cones, and square-based pyramids.
What is a 3D Shape?
A 3D shape is a solid object that has length, width, and height. We can hold and see all sides of a 3D shape.
Meet the Shapes!
Today we will look at cubes, cylinders, spheres, cuboids, cones, and square-based pyramids.
What is a Face?
A face is a flat or curved surface on a 3D shape. You can touch and count the faces.
What is an Edge?
An edge is where two faces meet. Edges are the lines you can see and feel on a shape.
What is a Vertex?
A vertex (plural: vertices) is a corner where edges meet. You can count the points on a 3D shape.
Let's Look at a Cube
A cube has 6 faces, 12 edges, and 8 vertices. All faces are squares.
What About a Cylinder?
A cylinder has 3 faces (2 flat and 1 curved), 2 edges, and no vertices.
Spotlight on the Sphere
A sphere has 1 curved face, 0 edges and 0 vertices. It is round with no corners.
Square-Based Pyramid Features
A square-based pyramid has 5 faces, 8 edges, and 5 vertices. Four faces are triangles and one is a square.
Time for a Quick Quiz!
Which has 8 vertices?
Which shape has no edges?
a) Cube b) Sphere c) Cylinder
a) Square-based pyramid b) Cuboid c) Cone
Well Done!
Now you can spot faces, edges, and vertices on 3D shapes. Keep looking for these in the world around you!
Write down 3 things you learned in this lesson.
Write down 2 things you want to know more about.
Ask 1 question about something you haven't quite understood yet.
