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## Basic geometry and measurement

### Course: Basic geometry and measurement>Unit 12

Lesson 1: Scale copies

# Identifying scale factor in drawings

Identify the scale factor used to create a scale copy.

## Want to join the conversation?

• I'm still a little confused. I have to turn it into a fraction and it said my fraction was wrong so I flipped it and it was still wrong. Does anyone know how to turn it into a fraction correctly?
• Yes, so when you are looking for the ratio between two similar numbers it is very important to look at the order. If they said ratio of A to B you would do 2/6. The easiest mistake to do in these kind of problems is use the wrong length, just because the shapes are similar does not mean you pick and side length, you must pick the one is corresponding. So if I had two right triangles that were similar, when I found the proportion I couldn't use the smallest side of one and the biggest of the other.
• how much could a wood chuck chuck if a wood chuck could chuck wood
• 83% of the forest causing mass genocide of a variety of species.
• I watched this then took the test and got a fifty on it
• maybe you were having trouble on it? if you were having a hard time, you should rewatch the video and retake the test. however, if this was a hate comment, not very nice! im sorry if it wasn't
-token
• Why didn't Sal measure the longest side of the figure but did that to the rest of the other sides?
• Because you haven't learned the pythagorean theorem yet
• how do you find the scale factor if two sides are missing and if the side that you are multiplying is also gone as well?
• is this the same video in a nutshell
• I get how to do it, but how do I put it in as an answer? Every time I try it says incorrect. (How do you write it out?)
• What if we need to find X one of the sides