Download presentation

Presentation is loading. Please wait.

1
**5.8 Scale Drawing and Models**

2
Scale Drawing/Model Is used to represent an object that is too large or to small to be drawn or built to its actual size and is proportional to the actual.

3
**Ratio of the model to the actual**

Scale Ratio of the model to the actual

4
To Find Scale

5
Example 1 The length of a model of a bridge is 16 inches. The actual length of the bridge is 50 yards. What is the scale of the model? The scale is 1 in = yards

6
**Meaning the actual is 24 times as big**

Scale Factor When the scale drawing and model have the same unit of measure. Example: Scale: 1 inch = 2 feet Scale Factor: 1in : 24 in Meaning the actual is 24 times as big

7
**The actual is 96 times the map length**

Example 2: A map of a natural history museum shows that the dinosaur exhibit room is 7.25 inches wide. If the scale on the map is 1 inch = 8 feet, what is the width of the actual exhibit room? Method 1: Using Scale and Proportions Method 2: Using Scale Factor and Equations 1in = 8 feet The actual is 96 times the map length Let a= actual, m= map a=96m a=96(7.25) a=696 inches 58 feet

8
**Example 3 Construct a Scale Drawing on Paper**

An architect is designing a school courtyard that is 45 feet long and 30 feet wide. Make a scale drawing of the courtyard. Use a scale of 0.5 inch= 10 feet. Use ¼ inch graph paper. 0.5 inches = 2 boxes on the ¼ inch graph paper Length: 45/10= 4.5 of 2 boxes= 4.5 (2) = 9 boxes Width: 30/10=3 of 2 boxes= 3(2)= 6 boxes Draw it

9
Homework Page 227 (2-16) even

Similar presentations

OK

Tom, Jerry, and Wilson all received a certain amount of liquid silver as an inheritance from their grandparents. Tom received 5 cups of silver, Jerry.

Tom, Jerry, and Wilson all received a certain amount of liquid silver as an inheritance from their grandparents. Tom received 5 cups of silver, Jerry.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on smart power grid Ppt on articles of association of private Ppt on db2 introduction to computers Ppt on paintings and photographs related to colonial period of american Free ppt on motions of the earth Ppt on eisenmenger syndrome image Ppt online compressor parts Ppt on file system Ppt on real numbers for class 9th sample Animated ppt on magnetism powerpoint