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Published byPaige McKay Modified over 2 years ago

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How to Scale

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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

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All Maps Include a Scale Bar

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Scales give you an equivalence factor – Ex: 1 inch = 200 miles – Ex: 1 centimeter = 3 meters

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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

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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: Whats the scale? Lets use 1 cm = 5m – Step 2: Whats the real distance? 15 meters between the swings and the slide

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– Step 3: Whats the scaled distance? We need to do a conversion 1 cm 5 m = x cm 15 m

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

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Solve for x (1) (15) = (5) (x) 55 x = 3 cm You should draw the slide 3 cm away from the swings on your map

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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.

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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

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