A paper model of the Khafre pyramid in Egypt has a square base 7.2 centimeters on each side. The slant height is 6 centimeters. How much paper was used to make the model?

To find how much paper for the model, you will use the formula for area of a square and area of a triangle.

A = bh
7.2 x 7.2
A = 51.84 cm²

A = 1/2bh
1/2 x 7.2 x 6
A = 21.6 cm²

21.6 cm² x 4 = 86.4 cm²

86.4 + 51.86=138.3

You will need 138.3 cm² of paper.