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# Identifying scale factors

Sal looks at a figure and a scale copy of the figure to determine what scale factor was used to create the scale copy.

## Want to join the conversation?

• Is the scale factor 1:3? I think I'm right, but I'm not sure.
• no the scale factor is only 3
• I didn't get why it was 4, 6.5 , and 12. Isn't the scale factor suppose to be less than one?
• No, if a Scale Factor is less than 1, you will be shrinking a shape. If it is greater than 1, it will be expanding.
• how do you do the videos
• You click on the big triangle that should pop up.
• with the first example i am confused. if figure b side is 6 and figure a side is two , how is it scale up by 3? i'm not understand how he got the 3. to go from 2 to 6 is four
• Its not, its 1/3
(1 vote)
• great video, but how would you decide between the three options left at the end, saying that your problem is not a multiple choice but a direct answer how would you finish solving that?
• If it was not multiple choice, you could say that it is <16. Or they might provide you more information to enable you to completely solve it.
• What if the figures are triangles?
• I don't understand how we are looking for a scale less than one, then we are looking for answers less than 16. Does less than one mean the scale will just be smaller? I am missing something.