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The height of each triangle is given by y = 5 tan θ, where θ = 54°.
Plugging in θ = 54°, we get:
y = 5 tan 54°
y = 5 * 1.3764
y ≈ 6.882 ft
The area of each triangle is given by A = 1/2 * base * height.
Since the base of each triangle is 5 ft (due to it being a side of the pentagon), the area of each triangle is:
A = 1/2 * 5 ft * 6.882 ft
A ≈ 17.205 ft²
Since there are five congruent triangles in the pentagon, the total area of the pentagon is:
Total Area = 5 * 17.205 ft²
Total Area ≈ 86.025 ft²
Therefore, the area of the pentagon is approximately 86 ft².