Re: Double the Area of a Circle
Hi Acorn,
Did 141.4142% or 141.4213% not work for you?
Many thanks,
Ben
Re: Double the Area of a Circle
cross posted with ben...
that rings a bell actually back to A sized paper in fact, the ratio of one side [eg 420mm] to the other [eg 594mm]
looking again I can see the 1.333 is obviously wrong... but still its an approximation to four decimal places
Re: Double the Area of a Circle
Quote:
Originally Posted by
handrawn
well having though you need to increase the circle by 133.3333333[ad naus.] % in fixed aspect - not too helpful in a decimal calculation if you want precision, but a step in the right direction maybe
Sorry but that increases the area to 177.7(r)%. We need 200%.
Again, don't calculate!
Acorn
Re: Double the Area of a Circle
square root of 2 sounds like maths, not my subject 2 pi r squared and all that...
Re: Double the Area of a Circle
yes I was looking at the wrong ratio.. so even a precentage is not allowed.... ok....
Re: Double the Area of a Circle
Quote:
Originally Posted by
handrawn
cross posted with ben...
that rings a bell actually back to A sized paper in fact, the ratio of one side [eg 420mm] to the other [eg 594mm]
looking again I can see the 1.333 is obviously wrong... but still its an approximation to four decimal places
For two A4s to have the area of one A3 and keep the sides in the same ration then the sides have to be ratio √2:1.
A4 is 297 x 210 mm and 297/210 is 1.414286 (594/420 clearly has the same ratio).
Acorn
Re: Double the Area of a Circle
Quote:
Originally Posted by
Acorn
As two sheets of A5 is one A4 and two of A4 is one A3, I would have argued it was 50% area. To get there you need to scale dimensions 70.71% [(√2)/2].
Acorn
70.71% being the obverse [if thats the right word] of 141.4142
but this does not help with the problem <sigh>
Re: Double the Area of a Circle
Quote:
Originally Posted by
Ben.Moses
Hi Acorn,
Did 141.4142% or 141.4213% not work for you?
Many thanks, Ben
Yes Ben, it did, but calculations are excluded in this Challenge.
Acorn
Re: Double the Area of a Circle
Quote:
Originally Posted by
handrawn
70.71% being the obverse [if thats the right word] of 141.4142
but this does not help with the problem <sigh>
'fraid so. 0.7071 is the inverse of 1.41421.
Acorn
Re: Double the Area of a Circle
Hi Acorn,
My bad, thought you were asking for help, didn't realise this was a challenge.
Many thanks,
Ben