Henry Ernest Dudeney/Puzzles and Curious Problems/188 - Squaring the Circle/Mistake
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Source Work
1932: Henry Ernest Dudeney: Puzzles and Curious Problems:
- Geometrical Problems
- Dissection Puzzles
- $188$. -- Squaring the Circle
- Dissection Puzzles
1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems:
- Geometrical Problems
- Circle Puzzles
- $289$. Squaring the Circle
- Circle Puzzles
Mistake
- The distance $DG$, added to the distance $GH$, gives a quarter of the length of the circumference, correct within a five-thousandth part.
Correction
- $\dfrac {1.571174 - 1.570796} {1.571174} \approx 4155$
That is, it is correct within a $4000$th part, but not a $5000$th part.
Sources
- 1932: Henry Ernest Dudeney: Puzzles and Curious Problems ... (previous) ... (next): Solutions: $188$. -- Squaring the Circle
- 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Answers: $289$. Squaring the Circle