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I’ve reported elsewhere my suggestion that the circle area formula in the Rhind Papyrus (deduct one-ninth from the diameter and square the result) may well derive from squaring the circle using 256/81 as pi.



What then becomes apparent is that this could be a key to the formula (pi.r) squared. Take any diameter, perform the calculation and divide the answer by pi as 256/81:

Diameter 6, answer = 9
Diameter 8, answer = 16
Diameter 10, answer = 25
Diameter 14, answer = 49

Need I go on? I imagine it possible that someone would have seen the significance of this, and all that’s missing now is naysayers demanding proof.

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Subject Views Written By Posted
Area and the Rhind Papyrus 984 gjb 09-Jan-19 05:13
Re: Area and the Rhind Papyrus 210 engbren 09-Jan-19 06:03
Re: Area and the Rhind Papyrus 199 gjb 09-Jan-19 06:10
Re: Area and the Rhind Papyrus 172 engbren 09-Jan-19 06:30
Re: Area and the Rhind Papyrus 206 DavidK 09-Jan-19 10:06
Re: Area and the Rhind Papyrus 176 gjb 09-Jan-19 13:32
Re: Area and the Rhind Papyrus 182 Sirfiroth 09-Jan-19 15:04
Re: Area and the Rhind Papyrus 162 DavidK 09-Jan-19 20:02
Re: Area and the Rhind Papyrus 159 Sirfiroth 09-Jan-19 21:06
Re: Area and the Rhind Papyrus 202 engbren 10-Jan-19 02:02
Re: Area and the Rhind Papyrus 177 Sirfiroth 10-Jan-19 04:15
Re: Area and the Rhind Papyrus 206 engbren 10-Jan-19 05:53
Re: Area and the Rhind Papyrus 179 engbren 15-Jan-19 04:50
Re: Area and the Rhind Papyrus 189 Lee McGiffen 10-Jan-19 10:56
Re: Area and the Rhind Papyrus 230 Scott Creighton 10-Jan-19 12:33
Re: Area and the Rhind Papyrus 223 Martin Stower 12-Jan-19 18:23
Re: Area and the Rhind Papyrus 142 Warwick 14-Jan-19 21:04
Re: Area and the Rhind Papyrus 188 DavidK 10-Jan-19 13:57
Re: Area and the Rhind Papyrus 223 Scott Creighton 10-Jan-19 14:16
Re: Area and the Rhind Papyrus 207 DavidK 10-Jan-19 17:10
Re: Area and the Rhind Papyrus 299 Sirfiroth 10-Jan-19 17:58
Re: Area and the Rhind Papyrus 188 engbren 16-Jan-19 10:24
Re: Area and the Rhind Papyrus 198 gjb 18-Jan-19 23:28
Re: Area and the Rhind Papyrus 207 DavidK 19-Jan-19 00:28
Re: Area and the Rhind Papyrus 211 engbren 06-Feb-19 12:56


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