Harriot, Thomas, Mss. 6785

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10553
[Commentary:
On this page, Harriot examines Problem VI from Apollonius Gallus (Viete 1600a, Prob , noting cases that were missed by Viète.
Problema VI.
Datis puncto, linea recta, & circulo, per datum punctam describere circulum, quem data linea recta & datus circulus

VI. Given a point, a line, and a circle, through the given point describe a circle that touches the given line and the given circle.]
(. – o) Apoll: Gallus. prob.
[Translation: Apollonius Gallus, Problem ]
alius casus:
a Vieta

[Translation: another case, missed by ]
Data.
punctum, a
linea bc
circulum def
Quæsitum. abc.
[Translation: Given:
the point a,
the line bc,
the circle def.
Sought: the circle abc.
Casus
1. cfd. Vieta.
2. cdf.
3. dcf.
4. dcf.
[Translation: Cases:
1. cfd, in Viète.
2. cdf.
3. dcf.
4. dcf, in Viète.
alter casus:
a Vieta

[Translation: another case missed by ]
In tribus prioribus
casibus
punctum (a) datum, est extra
datum circulum, et d punctum
est ad easdem partes lineæ datæ.
cum (a) puncto seu cum circulo
[Translation: In the three previous cases, the point a is outside the given circle, and the point d is on the same side of the given line as the point a or as the given circle.
In 4o casu, punctum (a) datum
est intra datum circulum
et d, a, sunt ad partes

[Translation: In the 4th case, the given point a is inside the given circle, and d and a are on opposite sides.

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