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### Course: Grade 7 (VA SOL)>Unit 6

Lesson 4: Scale drawings

# Scale drawings

Sal finds a missing side length in a scale drawing when given either a set of corresponding side lengths or one side length and the scale factor.

## Want to join the conversation?

• This kind of feels over complicated, this is a very simple thing.
• I know right?! but it was still pretty helpful once i understood what they meant
• Sal knows math, but not chickens. That my friends, is a Rooster.
• belly laughs for infinity
• my name is Bella btw I need help, I'm only 12 and in 7th grade;-;
• Hi Bella! Maybe this can help:

A scale drawing is a drawing of an object that is larger or smaller than, but proportional to, the original object.

If the scale drawing is larger than the original object, then it is called an enlargement.

If the scale drawing is smaller than the original object, then it is called a reduction.

A scale is a ratio of a length in the drawing to the corresponding length in the actual object.

You can write a scale in three ways: as a ratio, as a fraction, or with an equal sign:

*drawing length : actual length

drawing length / actual length

drawing length = actual length

To find the scale used in a drawing or model, divide the drawing length by the actual length. Then write the ratio in simplest form.

Hope this helps!
• explain a little more about it
• Could you also divide and get the same answer or does it have to be multiplied?
• try it yourself to see if it does work. both ways I mean.
• I kinda get it but not much
• this was a little confusing at first