Question

The net below can be folded to form a square pyramid.

Answer 1

Surface area of the square pyramid = 217.8 in²

Solution:

Side length of the square = 9 in

Area of the square = side × side

                                = 9 in × 9 in

                                = 81 in²

Area of the square = 81 in²

Perimeter of the base = 4 × 9 in = 36 in

Slant height of the triangle = 7.6 in

Surface area of the square pyramid

                            $=\frac{1}{2} \times \text{Perimeter} \times \text{Slant height} + \text{Base area}$

                            $=\frac{1}{2}\times 36\times 7.6+81$

                            $=136.8+81$

                            = 217.8 in²

Surface area of the square pyramid = 217.8 in²

Answer 2

Answer:

A:190.8

Step-by-step explanation: