Question

Sam is making a square pyramid out of cardboard. He drew a diagram of the square pyramid he is making as shown below. Based on Sam's diagram, how many square inches of cardboard make up his square pyramid?

9 square inches


20 square inches


24 square inches


28 square inches

Answer 1

24 square inches

Explanation:

Required number of square inches of cardboard =

=area of central square+

4 x area of each triangle shape

=2 x 2 + 4 x { 1/2 x 2 x 5 }

= 4 + 4 x {5}

= 4 + 20

= 24 square inches

Answer 2

9 square

Explanation:

Hope this helps