Question

Find the surface area of the net below.

Answer 1

Step-by-step explanation:

Area of 4 triangles = 1/2 x base x height

$=4 \times \frac{1}{2} \times 7 \times 5 \\ = 2 \times 7 \times 5 \\ = 14 \times 5 \\ = 70 {m}^{2}$

Area of middle square = Length x Width

$= 7 \times 7 \\ = 49 {m}^{2}$

Surface Area = Area of 4 triangles + Area of middle square =

$70 + 49 \\ = 139 {m}^{2}$