Answer:
Step-by-step explanation:
Total surface area of a square pyramid = area of the base + 4(area of a triangular face)
The base has a square shape = area of a square = L² = 7² = 49 ft²
area of each triangle = 1/2 × base × height
area of each triangle = 1/2 × 7 × 6
area of each triangle = 42/2
area of each triangle = 21 ft²
Area of the 4 triangle = 21 × 4 = 84 ft²
Total surface area of a square pyramid = 49 + 84 = 133 ft²
