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7th Math 3.21

Last updated over 2 years ago
5 questions

Math - [Lesson 3.21]

Teacher: Mr. Kovalik (408) 314-1092

Objective and Summary:
SWBAT compute the surface area of rectangular and triangular prisms
**SYW in formative is optional until the exit ticket today. You can use your notebook/printout/guided notes for calculations**
1

Wrap--A worker at Best Buy wants to put wrapping paper on the box of a gift. How much area does he need to cover?

CFS:
#1: Accurately computes area of the Bases
#2: Accurately computes lateral area
#3: Accurately computes surface area with proper units

1

Triangular--What is the surface area of this triangular prism?
HINT: Remember that the area of a triangle is \frac{1}{2}b\times h

CFS:
#1: Accurately computes area of the Bases
#2: Accurately computes lateral area
#3: Accurately computes surface area with proper units

1

Rectangular--How much material would be needed to exactly cover the outside of this piece of furniture?

CFS:
#1: Accurately computes area of the Bases
#2: Accurately computes lateral area
#3: Accurately computes surface area with proper units

1

SPICY--Try if you have time (optional)

Traps--This is a pretty tricky looking one. Find the surface area of this prism.

If you need a hint, think of the front and back trapezoids as your "bases" and the rest as unfolding rectangles.

CFS:
#1: Accurately computes area of the Bases
#2: Accurately computes lateral area
#3: Accurately computes surface area with proper units

4

Project--Mr. Kovalik's nephew has a lego piece that he wants to paint. If he wants to paint the entire outside of the block in the shape of a triangular prism, how many square millimeters will he need to cover?

HINT: Remember that the area of a triangle is \frac{1}{2}b\times h

**You MUST SYW in formative for credit**

CFS:
#1: Accurately computes area of the Bases
#2: Accurately computes lateral area
#3: Accurately computes surface area with proper units


I will show a demo using an interactive tool that lets us fold and unfold prisms. If you'd like to play around with it on your own, click this link!

N = 3 will give you a triangular prism, N = 4 is a rectangular prism, and so on. (N is the number of sides of your Base)
The two other sliders fold and unfold the Base and the rectangles that make up the lateral area.