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Any mathematicians on here please?. (33 posts / 883 views)
tazi tazi
Posts: 4,859
Post #16 14 Jul 2021 22:05
0
In reply to Post #15
Still gone whoosh mate.

If I had a request to make something 3.6m x 2.5m why couldn't I just make it as surely the diagonal measurement would just take care of itself?.

Edit - For two years running in my geography exam I got 10/100 so if I ever need a geography question asking please bear with me.

noj
Posts: 11,459
Social photographer...
Social photographer... Post #17 14 Jul 2021 22:12
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In reply to Post #16
Measure 3 feet along one wall and mark it, 4 feet along the next and mark it.. measure the diagonal to see if it's 5 feet
If it's not, with your maths, come and ask us again
Over that distance it could be well off that 4383mm
duggs
Posts: 5,559
Post #18 14 Jul 2021 22:18
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In reply to Post #16
The trouble is when making triangles, a small error can make a big difference in the angles. I've had to bin so many glass roof units as a lot of people just can't make a triangle based on three measurements, let alone two

It doesn't matter in the slightest for what you want, I just simplified the calculation Not showed for easier understanding
tazi tazi
Posts: 4,859
Post #19 14 Jul 2021 22:25
0
Cheers lads.

The confusing thing is that I wasn't asking for a triangle, just simply a rectangle.

Edit - If you could take a look on the covers&All website, type in sail shades and it'll show an image of straight sides sail shade....that's all I wanted a 4 straight side sail shade 3.6m x 2.5m but wouldn't allow me to move on further until I've filled in the diagonal measurement box.
tazi tazi
Posts: 4,859
Post #20 14 Jul 2021 22:28
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In reply to Post #17
Strangely enough I've just had to Knock a wall down in my daughters yard as those dodgy builders never put in a damp proof course which lead to it crumbling away.

Typical as I could have used that wall....
Tinhead Tinhead
Posts: 17,089
Post #21 14 Jul 2021 22:56
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In reply to Post #18
Do you do glass roofs, I thought you done kitchens?
duggs
Posts: 5,559
Post #22 15 Jul 2021 05:00
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In reply to Post #21
Not for a while now, they aren't very popular

I mostly do kitchens, plus wardrobes and general fitted furniture, but I still take on most chippy tasks when I feel like it. I frame the odd roof for a couple of building firms too
I have to keep my eye in and screwing boxes together gets boring
duggs
Posts: 5,559
Post #23 15 Jul 2021 06:22
0
In reply to Post #19
The diagonal measurement will be to allow for the rectangle being out of square, what you've ordered will have 4 right angle corners, so if it's going on brick walls that aren't square you will find it isn't quite parallel on all sides
noj
Posts: 11,459
Social photographer...
Social photographer... Post #24 15 Jul 2021 07:23
0
In reply to Post #22
Plus half the sparky, plumber and decorator's jobs as well 🙄

Tazi if you want a perfect rectangle just enter the size I said. If it's 2.5x3.6 going in a corner that's out of square and has to remain parallel to the wall that's quite a feat to translate into a drop down menu box with 1 diagonal measurement and get right!
If it's out in one direction you can be sure it's out elsewhere, so you need to measure it at the height of your fixings ideally and if it's really out how do you enter which side you're using as a flat reference, like staying parallel to the house and joining a perimeter wall that's out of whack?
You know what you need....





A builder
tazi tazi
Posts: 4,859
Post #25 15 Jul 2021 08:47
0
Cheers duggs, cheers noj as now I understand the importance of the diagonal measurement.

If this sail shade is just the job then I'll order another as a spare.
tazi tazi
Posts: 4,859
Post #26 15 Jul 2021 08:48
0
In reply to Post #23
tazi tazi
Posts: 4,859
Post #27 15 Jul 2021 13:17
0
How about this one please lads.....

Top = 98 inches.

Both sides = 142 inches.

Front = 113 inches.

What would the diagonal measurements be please from top left to bottom right corner and top right to bottom left corner?.

Thank you.
duggs
Posts: 5,559
Post #28 15 Jul 2021 14:16
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In reply to Post #27
I don't quite follow what your asking there tazi, if it's a rectangle with unequal ends, you need to physically measure the corners as that gives all you need to plot the shape out. Failing that you'd need at least one angle to start from
tazi tazi
Posts: 4,859
Post #29 15 Jul 2021 15:07
0
In reply to Post #28
The first one I measured was a rectangle because I needed to square the area up due to that previous cowboy builder not putting the dividing fence in a straight line. However I have now measured it with the fence as it is and those measurements I gave I think I've now sorted out the required diagonal measurement which give or take a little are as below.

450cm
430cm.
Sussexcarper93
Posts: 279
Post #30 15 Jul 2021 21:00
0
In reply to Post #29
Tazi- it's josh_shepz. How is the sail shade fixed? If it's on the tensioners which I'd be very surprised if it's not, make sure you or the company allow for the fact they stand off each corner around 150mm meaning you may need to reduce your overall measurement. It would seem such a simple thing to think the company would take care of but I had it recently with some blinds where the company didn't allow for the fixing brackets within a recess
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