13' x 13' (169 square feet) = 18.77 square yards. (divide square feet by 9 to get square yards)
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117 square feet = 13 square yards.
17' x 13' (221 square feet) = 24.55 square yards.
13' x 16' (208 square feet) = 23.11 square yards.
At least 31.77 square yards are needed.
20.22 square yards 13 ft x 14 ft = 182 square feet 182 square feet divided by 9 square feet per square yard = 20.22 square yards