Area and perimeter are so useful and often so easy to calculate. When we start looking at three-dimensional shapes, however, we find that surface area and volume are sometimes difficult to calculate. So, why bother? Well, we don't live in Flatland (Abbott, E. A.), we live in a three-dimensional world. In many ways, we need to understand three-dimensional space better than two-dimensional space. To begin, we will focus on the cube, cuboid (we will call it a rectangular prism, triangular prism, and cylinder.
Completely closed 3D shapes are called solids. The flat sides of a 3D shape are called its faces. Your homework for this evening is to name the shapes and the number of those shapes that make up the faces of the following solids:
Write the name and number of shapes that make up the faces of a:
1. cube
2. rectangular prism
3. triangular prism
4. cylinder
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