1. Similar Figures and SCALE
Math 7
Unit 5

2. Similar Figures and Indirect Measurement
Scale Drawing – A drawing that shows a real object with accurate sizes except they have all been reduced or enlarged by a certain amount (called the scale). Example of a scale drawing – Maps Architectural and engineering drawings Charts and pictures in books How does this relate to similar figures? Let’s look.

3. Similar Figures and Indirect Measurement
A map scale is 1 in. = 75 mi. The map distance between two towns is 3.5 in. Find the actual distance between the towns. Set up a proportion and solve.
The actual distance is miles.

4. Similar Figures and Indirect Measurement
My map scale says that 1 inch = 15 miles. Using the map, I measure the distance remaining on Interstate 40 as about 9 inches. How many miles do I still need to go to get to the beach?
The actual distance is 135 miles.

5. Similar Figures and Indirect Measurement
If we still have 135 miles to go and we continue going 60 miles per hour, how long until we get there?
It will take us 2 ¼ hours or 2 hours and 15 minutes.
÷60
÷60