There are: 13*9 = 117 square units
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13*9 = 117 square units
To find the area of a region for which you have the length and width, simply multiply the length by the width. Thus, for a room 13 units by 9 units, the area is 13 x 9 = 117 square units.
The base of the triangle is 13 units because 0.5*13*9 = 58.5 square units
13' x 13' (169 square feet) = 18.77 square yards. (divide square feet by 9 to get square yards)
Length = Width = 9 units.