If you glue 6 square faces together, they becomes a cube with 8 vertices and 12 edges.
Rectangular Prisms
Here's a rectangular shaped gift box:
It's made up of 6 rectangular faces.
When you join the sides together, it becomes a rectangular prism with 8 vertices and 12 edges.
Tip: All cubes are rectangular prisms, but not all rectangular prisms are cubes.
It's kind of like how all squares are rectangles, but not all rectangles are squares.
Triangular Prisms
Here's a triangular gift box:
It's made up of 5 faces (2 are triangles, 3 are rectangles).
Triangular prisms have 6 vertices and 9 edges! Can you count them?
Pyramids
Pyramids are made up of 5 faces (4 are triangles, 1 is a square).
When you join the faces together, it becomes a square-based pyramid with 5 vertices and 8 edges!
Cylinder
Cylinders have 2 circular faces and 1 curved surface.
Curved surfaces don't count as faces. Faces are flat.
When you wrap the surface around the circles, it becomes a cylinder with 2 edges and 0 vertices.
There are no sharp, pointy bits in a cylinder!
Cones
Cones like this party hat are made up of 1 surface and 1 circular face.
Cones have 1 vertex and 1 edge.
Spheres
Spheres have 0 faces, 0 edges and 0 vertices.
How would you gift wrap a sphere? It's tough without crumpling paper.
Great job! Now, you know all about vertices, faces, and edges!
Now, complete the practice. It helps you learn more and remember for longer.
