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Module 3 Lesson 21.notebook
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February 24, 2014
Module 3 Lesson 21
AIM: Surface Area
Do NowExit Ticket Lesson 20
HomeworkProblem Set 21#1 and 5
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Discussion:1.) What is surface area?
2.) How do you find the surface area of a three dimensional object?
Net: a two-dimensional representation of a three dimensional object
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Discussion:1.) Are the bottom and top faces of a right rectangular prism the bases of the prism?
2.) If we slice the right rectangular prism is half along a diagonal of a base, the two halves are called right triangular prisms. Why do you think they are called triangular prisms?
3.) Why must the triangular faces be the bases of these prisms?
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Practice:
The height of a right rectangular prism is 3.5 feet. The length and width of the prism's bases are 3 feet and 5.5 feet. Use the formula SA = LA + 2B to find the surface area of the right rectangular prism.
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