You measure it and add up the figures,- this is where learning math comes in handy, kids.
I assume the 2100 sq ft is the ground cover. It will require each wall to be measured and added together to get the overall interia messurements to get sq ft - is height multiplied by width of wall Therefore - a wall 15 feet high and 20 feet long will be 15x20 = 300sq ft
8-ft x 6-ft = 48 square feet
8-ft x 12-ft = 96 square feet
50 ft x 90 ft = 4500 square feet. One square yard (3 ft x 3 ft) = 9 square feet. Therefore, 4500 square feet = 500 square yards.
(7 ft) * 32 ft = 224 sq ft
Area of wall: 17 times 17 = 289 square feet
9.2 ft
80 ft
Measure the length by the width in feet. Multiply the one by the other and the answer will be square feet.
width x length divided by 144 will give you square ft.
If the wall is sloped uniformly then the length of the wall is irrelevant and the average height is (4+1)/2 = 2.5 feet. If the wall is not uniformly sloped you have no chance of answering the question!
length times width so if you have a room that is 10 ft by 10 ft then your room is 100 square feet 10 x10 =100