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# 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.
• 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
• my teacher is sooo confusing
• when arent they
• 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