Elementary plane geometry : inductive and deductive / by Alfred Baker (1903)
Baker, Alfred, 1848-1942 · Toronto : Gage · leaf 84
actice, an easy way todraw a tangent from anypoint A, outside the circle,is as follows: Place the set-square so that one of itssides passes through A andthe other through C, the cen-tre of the circle. Then soadjust the instrument thatthe right angle rests on the circumference at, say, B.AB, a… … 3. Let a circle be describedwith centre A, and the tan-gent at any point C be drawn;and let, with centre B, onAC, and radius BC, anothercircle be drawn. Then bothcircles have CD for tangent.Both touching the same lineat the same point, they aresaid to touch one another,—in this case internally.
Geometry, Plane
Internet Archive · Western University Libraries · 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-66-43.webp)
