Area of Ellipse/Proof 2/Historical Note
Historical Note on Proof 2 of Area of Ellipse
This was the proof given by the method of Bonaventura Francesco Cavalieri.
It is essentially the same method as Johannes Kepler, except that while Cavalieri used chords to divide the area up, Kepler used thin rectangles.
Sources
- 1992: George F. Simmons: Calculus Gems ... (previous) ... (next): Chapter $\text {A}.14$: Cavalieri ($\text {1598}$ – $\text {1647}$)