Answer:
144 m²
Step-by-step explanation:
The net is composed of a square and 4 congruent triangles
Area o square = 6 × 6 = 36 m²
Area of 1 triangle = 0.5 × b × h = 0.5 × 6 × 9 = 3 × 9 = 27m²
Area of 4 triangles = 4 × 27 = 108 m²
Surface area = 36 + 108 = 144 m²
