Your teacher will give you sheets of paper. Each student in the group should take one sheet of paper and complete these steps:

1. Locate and mark the center of your sheet of paper by drawing diagonals (or by another method).
2. Each student should choose one scale factor from the table. Make sure that each scale factor is chosen. On your paper, draw a dilation of the entire sheet of paper, using the center you marked as the center of dilation.
3. Measure the length and width of your dilated rectangle and calculate its area. Record the data in the table.
4. Cut out your dilated rectangle, and make a small hole in the center.

Now the group as a whole should complete the remaining steps:

1. Cut 1 long piece of string (more than 30 centimeters) and 4 shorter pieces of string. Make 4 marks, an equal distance apart, on the long piece of string.
2. Thread the long piece of string through the hole in the largest rectangle. Tie a shorter piece of string beneath it where you made the first mark on the string. This will hold up the rectangle so that it doesn't slide down the long string.
3. Thread the remaining pieces of paper onto the string from largest to smallest, tying a short piece of string beneath each one at the marks you made.
4. Hold up the end of the string to make your cross-sections resemble a pyramid. As a group, you may have to steady the cross-sections for the pyramid to clearly appear.