WithbothoftheprogramsthatI’veusednowyouarepresentedwithonesideofthecardandyou’resupposedtothinkoftheflipsideandthenclickabuttontocheckandtestyouraccuracy,thengradeifyouabsolutelyforgotit(usually0)upto“Iknowthisreallywell”(4or5dependingonthesoftware.)

With both of the programs that I’ve used now you are presented with one side of the card and you’re supposed to think of the flip side and then click a button to check and test your accuracy, then grade if you absolutely forgot it (usually 0) up to “I know this really well” (4 or 5 depending on the software.)


In1826hegeneralisedhistheoremtoahyperboloidofrevolution,ratherthanacone,relatingPascal'shexagon,Brianchon'shexagonandthehexagonformedbythegeneratorsofthehyperboloid.

In 1826 he generalised his theorem to a hyperboloid of revolution, rather than a cone, relating Pascal 's hexagon, Brianchon 's hexagon and the hexagon formed by the generators of the hyperboloid.


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Thelightisletintotheeyethroughthepupil,whichisactuallyanopeningintheiris.
The light is let into the eye through the pupil, which is actually an opening in the iris.