Exercises on Euclid and in modern geometry for the use of schools, private students, and junior university students (1881)
McDowell, James L · Cambridge, Deighton, Bell, and Co. · leaf 221
site sides pass through the same point 0(168, Cor.). k Now, in the triangle ABC, the straight lines drawn from 0to the angles A\ B, C intersect the opposite sides in A, B, Crespectively, therefore (169) the intersections of BC and BC,CA and CA, AB and AB, viz. the points L, 31, X lie in astraight… … Defs. (1) If the straight line joining the centres oftwo circles be cut internally and externally in the ratio ofthe corresponding radii, the points of section are calledrespectively the internal and external centres of similitude ofthe two circles. It will be evident, by constructing for the two…
Geometry
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-359-250.webp)
