Need help from a mathematician

[devonwoody]

I actually want the white line to measure 28mm, corner to corner, for the harlequin box, I suddenly remembered that the diagonal is longer than the square which I had estimated at 28mil (and 9 squares make 252 mm.)

So what size should the square be please?

 

[knappers]

19.8mm

Si.

 

[devonwoody]

Thanks, that reply was quicker than working it out myself, its my memory that fails me these days.

 

[DOOGYREV]

no its 39.59mm

Sorry was just looking at the picture, saw the white line and the ?, didnt read the actual question Si is right.

 

[devonwoody]

I phrased the original question poorly.

I want to finish with a diagonal of 28mm so the square should be 19.8.

 

[barkwindjammer]

Knappers is right

 

[devonwoody]

Acutually I shall now make the square 20 mm so what will my diagonal finish up at? :wink:

 

[jumps]

no its 39.59mm

you have to read these trick questions, rather than relying on the diagram!

whilst the white line would be 39.6mm if the sides were 28mm as indicated, the question was 'what would the sides have to be to make the white line 28mm?' - and the answer has been given (19.8mm)

 

[jumps]

Acutually I shall now make the square 20 mm so what will my diagonal finish up at? :wink:

28.284mm

 

[barkwindjammer]

19.8, to allow for seasonal movement

 

[DOOGYREV]

Acutually I shall now make the square 20 mm so what will my diagonal finish up at? :wink:

28.28mm ?

 

[jimi43]

Some officers have curly auburn hair to offer attraction

 

[jimi43]

sine45=20/H

H=20/sine45

H=20/0.707

H=28.3mm near as dammit

J

 

[devonwoody]

36m. ??????????????????????

 

[barkwindjammer]

36m. ??????????????????????

That would be a 'tissue distribution centre' :shock:

 

[devonwoody]

36m. ??????????????????????

That would be a 'tissue distribution centre' :shock:

That was to solve the problem for me, not mm, but m's :lol: :lol: :lol:

 

[Eric The Viking]

It's a right-angled triangle, so use Pythagoras' theorem:

(20 squared) + (20squared) = (your distance)squared

So, sqroot (20squared + 20squared) = your distance.

sqroot 800 = 28.28 (approx.)

 

[9fingers]

DW, all you need to remember (or write on the wall) is the value of Sqrt 2= 1.414

The diagonal of any square is sqrt 2 times the length of it's side.

Bob

 

[jumps]

DW, all you need to remember (or write on the wall) is the value of Sqrt 2= 1.414

The diagonal of any square is sqrt 2 times the length of it's side.

Bob

now don't go giving away the really easy solutions Bob......... =D>

 

[devonwoody]

OK thanks all. I had to print this one out, my little head could not cope with all the changes. Switching over to tissue boxes.