Compare Vertices, Faces, and Edges

You've done a great job counting the parts of 3D shapes! π

Sometimes, you will be asked to compare them.Β

**Comparing **in Math is looking at two different things, and deciding if one is bigger or smaller.

Before we compare, let's review counting the parts of a 3D shape.Β

π This is a rectangular prism.

How many faces does it have?Β

How many edges and vertices?

6 faces

12 edges

8 vertices

Excellent! β

Let's try comparing two 3D shapes now.

One shape is pyramid, and the other shape is a rectangular prism. π

Count the vertices in each of the shapes. Which has **more**?

The pyramid has 5 vertices.

The prism has 8 vertices.

πThe prism has more vertices!

Next, count the faces of each shape. Which has **less**?Β

The pyramid has 5 faces.

The prism has 6 faces.

π The pyramid has fewer vertices!

Now, count the edges of each shape. Which has **more**?Β

The pyramid has 8 edges.

The prism has 12 edges.

πThe prism has more edges!

Good job! You're all set to compare 3D shapes!Β

Now try the practice questions. π

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