7th Grade Math

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Composite Figures

PART A B C

Multi-Part

Lesson 3

Addresses

GLE 0706.1.8.

604 Volume and Surface Area

Main Idea

Explore volume and

surface area of

composite figures.

Vocabulary

composite figure

Composite Figures

ARCHITECTURE A company

6 cm

4 cm

2 cm

2cm 22 cmcmc

111 cmcmcm

made a model of a new^

office building. The building

is composed of rectangular

prisms. Create a model

of the building using

centimeter cubes to find the

volume and surface area.

A composite figure is made up of two or more three-dimensional

figures.

What do you need to find? the volume and surface area of the

model office building

Model the top and bottom rectangular prisms

using models.

Bottom Top

Copy and complete the table using the models from

Step 1. Count the cubes to find the dimensions.

Length

(cm)

Width

(cm)

Rectangular

Prism

Bottom

Top

6

4

1

1

2

2

Volume

(cm^3 )

Surface

Area (cm^2 )

Height

(cm)

Copy the table and use the models from Step 1 to find

the total volume of the model.

the Results

1. How many cubes did it take to create the model? What does this
   number represent?


2. What is the total surface area of both prisms?


3. What is the total surface area of the model? Explain.

V

c

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