Unit D: Geometry
Chapter 7 - 2-D Shapes and 3-D Objects


Lesson 3 - Surface Area

Packages sent by land or air often have to resist enormous amounts of wear and tear. Usually, the boxes are rectangular prisms wrapped with sturdy, brown postal paper. The cost of package delivery depends on where it is going and how heavy it is. Knowing the amount of packaging required and the shape of packages that optimize volume are important considerations for companies that ship a lot of goods.



   The Goal

Here are the things you will do in this lesson.

  • Find the surface areas of 3-D objects.
  • Determine if a solution to a surface area problem is correct.
  • Recognize and use appropriate imperial and SI units for surface area.

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