To find the total surface area of the tent, add up the surface area of each face:
Surface area of triangular base: 1/2 * 4.75ft * 3ft = 7.125 square feet
Surface area of front rectangle face: 4.75ft * 4ft = 19 square feet
Surface area of back rectangle face: 4.75ft * 4ft = 19 square feet
Total surface area of the tent: 7.125 + 19 + 19 = 45.125 square feet
So, you would need 45.125 square feet of fabric to make the tent.