Course 2, Lesson 7-5
Find the length of each object on a scale drawing with the given scale.
Then find the scale factor.
1. a subway car 34 feet long; 1 inch = 5 feet
2. a table 1.5 meters long; 3 centimeters = 0.25 meters
3. The distance between New York City and Washington, D.C., is
3.75 inches on a map of the United States. The scale on the map
is 1 inch to 90 miles. How far is Washington, D.C., from New York
City?
4. The actual distance from Atlanta to New Hope is 425 miles. A
map shows a distance of inches. Write a ratio to accurately
show the relationship between the actual distance and the scale
distance?
2
6
3
Course 2, Lesson 7-5
ANSWERS
1. in.;
2. 18 cm;
3. 337.5 mi
4.
4
6
5
1
60
3
25
3
63 :1
4
Geometry
Course 2, Lesson 7-5
HOW does geometry help us
describe real-world objects?
Course 2, Lesson 7-5 Common Core State Standards © Copyright 2010. National Governors Association Center for Best Practices and
Council of Chief State School Officers. All rights reserved.
Geometry
• Preparation for 7.G.3
Describe the two-dimensional figures that result from slicing three-
dimensional figures, as in plane sections of right rectangular prisms
and right rectangular pyramids.
Mathematical Practices
1 Make sense of problems and persevere in solving them.
3 Construct viable arguments and critique the reasoning of others.
4 Model with mathematics.
• To draw the top, side, and front views
of a three-dimensional figure
• To draw the corner view of a three-
dimensional figure given the figure’s
top, side, and front views
Course 2, Lesson 7-5
Geometry
1
Need Another Example?
2
Step-by-Step Example
1. Draw a top, a side, and a
front view of the figure at
the right.
The top view is a triangle.
The side and front view are rectangles.
Answer
Need Another Example?
Draw a top, a side, and a front view of the
figure below.
1
Need Another Example?
2
Step-by-Step Example
2. Draw a top, a side, and a
front view of the figure at
the right.
The top view is a circle.
The side and front view are triangles.
Answer
Need Another Example?
Draw a top, a side, and a front view of the
figure below.
1
Need Another Example?
2
Step-by-Step Example
3. Draw a top, a side, and a front view of the video
console shown.
The top view is a rectangle.
The side and front views are also rectangles.
Answer
Need Another Example?
Draw a top, a side, and a front view of the soup
can shown.
1
Need Another Example?
2
3
Step-by-Step Example
4. Draw a corner view of the three-
dimensional figure whose top, side,
and front views are shown.
Use the top view to draw the
base of the figure, a 1-by-3
rectangle.
Use the side and front views
to complete the figure.
Add edges to make the
base a solid figure.
top
front side
Answer
Need Another Example?
Draw a corner view of the three-dimensional figure
whose top, side, and front views are shown.
1
Need Another Example?
2
3
Step-by-Step Example
5. Draw a corner view of the three-dimensional figure
whose top view, side view, and front view are shown.
Use the top view to draw
the base of the figure,
a 2-by-4 rectangle.
Use the side and front views to complete
the figure.
Add edges to make the base a solid figure.
top
front side
Answer
Need Another Example?
Draw a corner view of the three-dimensional figure
whose top, side, and front views are shown.
How did what you learned
today help you answer the
Course 2, Lesson 7-5
Geometry
HOW does geometry help us
describe real-world objects?
How did what you learned
today help you answer the
Course 2, Lesson 7-5
Geometry
HOW does geometry help us
describe real-world objects?
Sample answers:
• To draw top, side, front, and corner views of a three-
dimensional real-world object
• To draw a corner view of a three-dimensional real-world
object given the object’s top, side, and front views
Explain how knowing
how to draw
three-dimensional
figures helps in finding
the volume of
three-dimensional figures.
Course 2, Lesson 7-5
Ratios and Proportional RelationshipsFunctionsGeometry

(7) Lesson 7.5

  • 1.
    Course 2, Lesson7-5 Find the length of each object on a scale drawing with the given scale. Then find the scale factor. 1. a subway car 34 feet long; 1 inch = 5 feet 2. a table 1.5 meters long; 3 centimeters = 0.25 meters 3. The distance between New York City and Washington, D.C., is 3.75 inches on a map of the United States. The scale on the map is 1 inch to 90 miles. How far is Washington, D.C., from New York City? 4. The actual distance from Atlanta to New Hope is 425 miles. A map shows a distance of inches. Write a ratio to accurately show the relationship between the actual distance and the scale distance? 2 6 3
  • 2.
    Course 2, Lesson7-5 ANSWERS 1. in.; 2. 18 cm; 3. 337.5 mi 4. 4 6 5 1 60 3 25 3 63 :1 4
  • 3.
    Geometry Course 2, Lesson7-5 HOW does geometry help us describe real-world objects?
  • 4.
    Course 2, Lesson7-5 Common Core State Standards © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved. Geometry • Preparation for 7.G.3 Describe the two-dimensional figures that result from slicing three- dimensional figures, as in plane sections of right rectangular prisms and right rectangular pyramids. Mathematical Practices 1 Make sense of problems and persevere in solving them. 3 Construct viable arguments and critique the reasoning of others. 4 Model with mathematics.
  • 5.
    • To drawthe top, side, and front views of a three-dimensional figure • To draw the corner view of a three- dimensional figure given the figure’s top, side, and front views Course 2, Lesson 7-5 Geometry
  • 6.
    1 Need Another Example? 2 Step-by-StepExample 1. Draw a top, a side, and a front view of the figure at the right. The top view is a triangle. The side and front view are rectangles.
  • 7.
    Answer Need Another Example? Drawa top, a side, and a front view of the figure below.
  • 8.
    1 Need Another Example? 2 Step-by-StepExample 2. Draw a top, a side, and a front view of the figure at the right. The top view is a circle. The side and front view are triangles.
  • 9.
    Answer Need Another Example? Drawa top, a side, and a front view of the figure below.
  • 10.
    1 Need Another Example? 2 Step-by-StepExample 3. Draw a top, a side, and a front view of the video console shown. The top view is a rectangle. The side and front views are also rectangles.
  • 11.
    Answer Need Another Example? Drawa top, a side, and a front view of the soup can shown.
  • 12.
    1 Need Another Example? 2 3 Step-by-StepExample 4. Draw a corner view of the three- dimensional figure whose top, side, and front views are shown. Use the top view to draw the base of the figure, a 1-by-3 rectangle. Use the side and front views to complete the figure. Add edges to make the base a solid figure. top front side
  • 13.
    Answer Need Another Example? Drawa corner view of the three-dimensional figure whose top, side, and front views are shown.
  • 14.
    1 Need Another Example? 2 3 Step-by-StepExample 5. Draw a corner view of the three-dimensional figure whose top view, side view, and front view are shown. Use the top view to draw the base of the figure, a 2-by-4 rectangle. Use the side and front views to complete the figure. Add edges to make the base a solid figure. top front side
  • 15.
    Answer Need Another Example? Drawa corner view of the three-dimensional figure whose top, side, and front views are shown.
  • 16.
    How did whatyou learned today help you answer the Course 2, Lesson 7-5 Geometry HOW does geometry help us describe real-world objects?
  • 17.
    How did whatyou learned today help you answer the Course 2, Lesson 7-5 Geometry HOW does geometry help us describe real-world objects? Sample answers: • To draw top, side, front, and corner views of a three- dimensional real-world object • To draw a corner view of a three-dimensional real-world object given the object’s top, side, and front views
  • 18.
    Explain how knowing howto draw three-dimensional figures helps in finding the volume of three-dimensional figures. Course 2, Lesson 7-5 Ratios and Proportional RelationshipsFunctionsGeometry