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# Identifying scale copies

Sal looks at side measures on figures to determine if they are scale copies.

## Want to join the conversation?

• how can we actually calculate the scale copy of one figure to the other figure?
Thanks to people who help to answer this question.
• Eunice, first you have to look at one of the sides of the scaled copy. If they are divisible by the numbers in the original shape, then try and see if the others sides of the scaled copy are scaled by the same factor. If they are, then they are a scaled copy. Hope this helped!
• i like cheeseburgers and french fries
• Hello awesome people! This is just a message to let you know that you're doing awesome! Don't push yourself too hard! If you're trying, that's all that matters! Make sure you take your meds, take a break, drink some water, eat some healthy food, and if you're feeling like it, exercise a little! You are loved so much and if you ever need to talk my scratch username is cinnqmorrol. Love you, bye!
• on your practice can you make the lines for the squares more visable, it is kind of hard to see.
• I don’t think he can do that. He would have to change the code for the exercises which he cannot do
• How would we do this with 3D shapes instead of 2D?
• this is easy.
• Guys im in 3rd grade lol
• Get better :)
• what is a scale copy? Help me plz.
• A scale copy of a figure is a figure that is geometrically similar to the original figure.

This means that the scale copy and the original figure have the same shape but possibly different sizes.

More precisely, the angles of the scale copy are equal to the corresponding angles of the original figure, and the ratio of the side lengths of the scale copy is the same as the ratio of the corresponding side lengths of the original figure.

In real life, a scale copy is often smaller than the original figure. For example, the drawing of a floor plan for a room is a scale copy of the actual floor of the room. The floor plan drawing has the same shape as but is smaller than the actual floor. For example, if the actual floor is a rectangle measuring 12 feet by 16 feet, a scale copy could be a drawing of a 6-inch by 8-inch rectangle (because 12ft:16ft is the same ratio as 6in:8in).