8. The perimeter of a figure is 10 . A scale
   copy is made using a scale factor of 3 .
   What is the perimeter of the scale copy?

When you create a scale copy of a figure, the perimeter scales in the same way as the dimensions. Since the original figure has a perimeter of 10 and the scale factor is 3, you simply multiply the original perimeter by the scale factor. So, . The perimeter of the scale copy is 30.

In addition to scaling the perimeter, remember that when you change dimensions, areas change by the square of the scale factor. This means if you were to calculate the area of the original figure and then the area of the scale copy, you’d square the scale factor. For our scale factor of 3, any area calculation would be multiplied by , which equals 9. So be cautious in mixing up area and perimeter when scaling!