If you are talking about 11 by 13 inches the answer is 11x13=141.
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1,520.53 square inches.
9.628874057 square inches rounded to two decimal places is 9.63 square inches.
Diameter = 11 inches so area = pi*d2/4 = 95.03 sq inches.Diameter = 11 inches so area = pi*d2/4 = 95.03 sq inches.Diameter = 11 inches so area = pi*d2/4 = 95.03 sq inches.Diameter = 11 inches so area = pi*d2/4 = 95.03 sq inches.
11 x 8 = 88 square inches (88 in2)
Perimeter = 32 inches. Area = 55 square inches.