How do you find the square footage of an odd shape?

lawnmowermanswife

Here is my shape. How do I find how many sq feet it is?

I know I could Google to find out but lets face it, I'm too lazy to do that and you boys are smarter than me. So just tell me the answer. Can you see me batting my eyelashs? Thanks!

Clemaz

alifaxwa2

I don't think you have enough info there. That small unlabeled edge is it 4 also? what does the 14 designate exactly? Length of the curved line?

lawnmowermanswife

My first thought would be to add all the sides together, but I'm sure it can't be that easy.

Where are all the smart people? Being dumb sucks!

lawnmowermanswife

<< <i>I don't think you have enough info there. That small unlabeled edge is it 4 also? what does the 14 designate exactly? Length of the curved line? >>



I don't know what the unlabled side is suppose to be, that's why it is unlabled. Matt took the measurements blame him.

The curved side is 14. Taken by measuring the curve as if it were strait. Just a "close to it" measurement.

alifaxwa2

even if we assume its 4 , we can't give an exact value with out knowing the radius(or diameter) of the circle that forms the curved section.

goose3

I don't know that it's possible to come up with the exact number.

Use the numbers you've got to do so.

Installing a hot tub or something?

what's the measurement of the very top horizontal line?

lawnmowermanswife

Can you just assume it's a strait line?

And if it were strait how so you figure it out? Do you add all the sides together?

sagard

area of circle = pi*r^2

Your section of the rectangle is roughly (.25)(3.14)(9^2)=64 sqare ft.

The rectangle is 10x14=140 sqare ft.

140-64=76 square ft. section.

goose3

sagard is onto something here....

draw 3 more of those diagrams mirroring the first so that the curved 14 creates a circle and that will create a rectangle that is 20 by 28. Figure out the area of the rectangle less the area of the enclosed circle and divide by 4.

sagard

If it is triangle section use triangle area. 1/2 base times height. Then subtract it from area of the whole room.

If I were buying hardwood/tile/pergo for that room I'd buy 100 square ft and hope for the best, you can always go back.

lawnmowermanswife

It's for sod in a shaped bed in a parking lot. I'm just trying to get an approximate amount of sq footage needed to fill it in.

When I look at it, I think of it as a 10x14 square minus "a little bit" for the smaller end LOL. That's why I need help.

nam812

Approximately 80 square feet, but if you're filling something in, then you need cubed feet, and to determine that the 3rd variable (besides length and width) would be depth. How deep are you filling? 6 inches? 18 inches? 3 feet?

lawnmowermanswife

Depth does not matter in this case we are just looking for how much space the surface is for sod.

HockeyAutoCollector

sagard was pretty much on. I would think you need to find the radius based off the circumference.

Circumference = 2(pi)(radius)

C = 14*4 = 56 = 2*3.14*radius
Radius = 8.92

Area = pi*radius^2 = 3.14 * 8.92^2 = 249.8

You only need to 1/4 of your circle area, so 249.8/4 is 62.45. Now subtract this from your rectangle area of 140 (10*14). The area should be 77.55, give or take a bit.

I think that is your answer, though I haven't done this stuff in awhile.

nam812

Tell Matt to just stick to mowing lawns and clearing leaves, and forget this fancy shmancy oddly shaped sod project.

jradke4

if you assume its a straight line you will be in excess of sod at the end of the project. thats better than having to go back to the store to get more. to get a more precise number would require some minor calculus to solve it. its not the hardest but i havent down any thing like calc in years.

vintagetoppsguy

<< <i>The curved side is 14. Taken by measuring the curve as if it were strait. Just a "close to it" measurement. >>



One of your numbers is way off. I graphed it out. If you measured the curved wall as a straight line, then you wouldn't have any top border.

See attached drawing

I would re-measure

bullrat

Square footage depends on how you're pricing the job. If it's cost plus, get 140 sq ft so you know you'll have enough - best purchased in 50 sq ft increments (more time & mileage to get sod) and don't forget to fertilize and salt the soil before putting down the sod. This will make it a job that keeps on giving - never guarantee sod will take hold.

If you have a different business plan, I'd guess 100 sq ft would work. 4'x10' +1/2 of 10'x10' would be 90 sq ft. Throw in another 10 sq ft just because to get 100 sq ft. Really without the length of the top line it's impossible to come up with the exact area.

Carew29

I never thought i would need this knowledge--until i ended up doing Metal Framing for 10 years in the late 80's

BobaFett72

looks like someone is mapping out someones hair transplant surgery

gameusedhoop

The easiset way to do an odd shape is to draw it on graph paper. Each full box becomes on square foot. Then all you have to do is add up the partial boxes by halves, thirds etc.

It seems too easy, but it works very well when you don't know an exact measurement or radius of a curve.

Just buy a bag of seed, and stop all this math stuff!

lawnmowerman

<< <i>


Just buy a bag of seed, and stop all this math stuff! >>





You guys are too much.

Thanks for all the help