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 Posted: Wed, 8th May 2013 10:57 Post subject: Finding the area of an irregular shape? |
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It's been a long time since I did maths at school, so could do with a little help. I need the area in Sq metres, it does not have to be down to the last mm as it's only for turf.
I hope just the dimensions are ok? I could draw the shape but not sure it's needed. it's roughly triangular in shape.
top = 1m
left side = 4 m
bottom = 5 m
right side = 5.5 m
So can anyone give me how many square metre I will need?
Thanks.
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| Posted: Wed, 8th May 2013 11:14 Post subject: |
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| Posted: Wed, 8th May 2013 11:31 Post subject: |
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Surely you mean 12.75? Seriously though, thank you.
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| Posted: Wed, 8th May 2013 11:43 Post subject: |
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| Posted: Wed, 8th May 2013 11:49 Post subject: |
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yea, in parts of europe we use ","
countries like usa, uk and colonies use "."
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| Posted: Wed, 8th May 2013 11:51 Post subject: |
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| The_Zeel wrote: | yea, in parts of europe we use ","
countries like usa, uk and colonies use "." |
I know, i was just messing.
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| Posted: Wed, 8th May 2013 12:11 Post subject: |
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I get 11.982 m^2
"Quantum mechanics is actually, contrary to it's reputation, unbeliveably simple, once you take the physics out."
Scott Aaronson | chiv wrote: | | thats true you know. newton didnt discover gravity. the apple told him about it, and then he killed it. the core was never found. |
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| Posted: Wed, 8th May 2013 12:13 Post subject: |
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I just used an online calculater (yeah something I could have done to begin with) and I got 12.01 Sqm.
Thanks for the help.
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| Posted: Wed, 8th May 2013 12:14 Post subject: |
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| dingo_d wrote: | | I get 11.982 m^2 |
i just quickly split it into 2 triangles, how did you do it?
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| Posted: Wed, 8th May 2013 12:21 Post subject: |
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| The_Zeel wrote: | | dingo_d wrote: | | I get 11.982 m^2 |
i just quickly split it into 2 triangles, how did you do it? |
Found the height and multiplied it by (a+b)/2.
The shape he's describing is a trapezoid.
a, b being top and bottom sides...
"Quantum mechanics is actually, contrary to it's reputation, unbeliveably simple, once you take the physics out."
Scott Aaronson | chiv wrote: | | thats true you know. newton didnt discover gravity. the apple told him about it, and then he killed it. the core was never found. |
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| Posted: Wed, 8th May 2013 12:28 Post subject: |
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but doesnt a trapezoid always have 2 parallel sides?
from his description i cant really 100% say that is the case.
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| Posted: Wed, 8th May 2013 12:45 Post subject: |
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Damn it people, there is universal formula for any planar quadrilateral, just see them nice TeX-generated pictures.
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| Posted: Wed, 8th May 2013 13:08 Post subject: |
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| The_Zeel wrote: | | Reg67 wrote: | The left side is at right angles to the bottom and the top, the slope is on the right hand side.  |
in that case i get 12 sqm, dingo_d was right |
In fact if the left is at right angle with top and bottom, then 12m^2 is exactly the area
Just divide into one right triangle and a rectangle, and the area combined is exactly 12 m^2.
I assumed it's just a trapezoid with no right angles, and used general formula
"Quantum mechanics is actually, contrary to it's reputation, unbeliveably simple, once you take the physics out."
Scott Aaronson | chiv wrote: | | thats true you know. newton didnt discover gravity. the apple told him about it, and then he killed it. the core was never found. |
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| Posted: Wed, 8th May 2013 15:57 Post subject: |
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Cheers for all the help, I ordered 13sqm, once I lay it I can tell kids to get off it...
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