Answer:
The surface area of her tent = 36.661 ft²
Step-by-step explanation:
∵ The tent is shaped square pyramid without base
∴ The tent has 4 triangular faces
∴ Its surface area = area of each triangular face × 4
∵ The triangular face has base of length 4ft and 2 equal sides of
length 5ft
∴ The height of the Δ = [tex]\sqrt{(5)^{2}-(\frac{4}{2})^{2}} =\sqrt{21}[/tex]
∴ Its surface area = 4 × [tex]\frac{1}{2}(4)(\sqrt{21}) =[/tex] = 36.661 ft²
