Draw a new rectangle that is an enlarged copy of your original rectangle and has a length of 13 units.
Notice that the side 7 units long corresponds to the side 13 units long.
Show how you can calculate the width of your new rectangle.
What number did you multiply 7 units by to get 13 units?
Use this same multiplier to calculate the new enlarged width.
Use the eTool below to help you better understand how scale factors work.
Click the link at right for the full version of the eTool: CC1 7-88 HW eTool