A times A or A^2
area = length x width area = 90 feet 10 feet x 9 feet = 90 square feet.
AREA = LENGTH x WIDTH LENGTH = 2 X WIDTH AREA = 2 x WIDTH X WIDTH = 900 900/2 = WIDTH X WIDTH 450 = WIDTH X WIDTH = WIDTH SQUARED WIDTH = SQUARE ROOT (450) = 21.21 FEET LENGTH = 42.42 FEET
15 feet
Area of a Square = Length*Length = 3*3 = 9 square feet.
49 square feet
area = length x width area = 90 feet 10 feet x 9 feet = 90 square feet.
10 ft
10 ft
8 Feet
8 feet
200 square feet. To calculate square feet simply multiply length by width - the result is the area in square feet.
225 square feet
AREA = LENGTH x WIDTH LENGTH = 2 X WIDTH AREA = 2 x WIDTH X WIDTH = 900 900/2 = WIDTH X WIDTH 450 = WIDTH X WIDTH = WIDTH SQUARED WIDTH = SQUARE ROOT (450) = 21.21 FEET LENGTH = 42.42 FEET
You don't measure the length and width in square feet. Square feet is an area. You measure the length and width in feet, then multiply them to get the area in square feet.
15 feet
If one side is twice the length of the other and the square footage is 800 I'd say one side is 20 feet and the other is 40.
A square patio? if so, and one side is 8 ft. then it is 64 ft square