Download presentation

Presentation is loading. Please wait.

1
How to Scale

2
**Why is scaling important?**

Imagine if you had to draw a “full-size” map of the United States! How much paper would it require? How much time would it take? Scaling allows us to take large objects or long distances and “shrink” them to a smaller size

3
**All Maps Include a Scale Bar**

4
**Scales give you an equivalence factor**

Ex: 1 inch = 200 miles Ex: 1 centimeter = 3 meters

5
**Okay, so how do I scale? Figure out what scale you want to use first.**

For our notes we will use 1 cm = 5 m, but you will get the chance to make up your own scale later Measure the actual (real) distance Convert the real distance to a scaled distance

6
A Sample Problem In a local park, the swings are 15 meters away from the slide. If I draw a scaled map of the park, how far apart from the swings should I draw the slide? Step 1: What’s the scale? Let’s use 1 cm = 5m Step 2: What’s the real distance? 15 meters between the swings and the slide

7
**= 1 cm 5 m x cm 15 m Step 3: What’s the scaled distance?**

We need to do a conversion 1 cm 5 m = x cm 15 m

8
Cross multiply 1 cm 5 m = x cm 15 m (1) (15) = (5) (x)

9
Solve for “x” (1) (15) = (5) (x) 5 x = 3 cm You should draw the slide 3 cm away from the swings on your map

10
Practice Main Street at Disneyland is 225 m long. Use the same scale (1 cm = 5 m) to determine how long you should draw Main Street on a map of Disneyland.

11
**RoundRobin Begin with partner who has the shiniest shoes.**

Explain to your partner the steps you followed to solve the problem. Thank your partner. Switch

Similar presentations

OK

Map Scale Looking at the maps on the screen ask the students which one has the largest scale? This will remind the students of what they have already learnt.

Map Scale Looking at the maps on the screen ask the students which one has the largest scale? This will remind the students of what they have already learnt.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Convert pdf ppt to ppt online Ppt on second law of thermodynamics definition Ppt on akbar's administration Ppt on metallic and nonmetallic minerals Ppt on introduction to object-oriented programming encapsulation Ppt on polynomials and coordinate geometry calculator Ppt on extinct plants and animals Ppt on history of our national flag Ppt on limits and continuity problems Ppt on content development