Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 75
93. To draw an inscribed and an escribed circle, tangential tothree given straight lines, forming a triangle ABC. Note.—An escribed circle is also called an excircle. Bisect the angles BAG and ACBby lines intersecting in F. FromF draw the line FH perpendicularto AD. With F as centre, andFH as… … 94. A principle of inscribed and escribed circles. If a triangle ABC be taken, andAF, BD, and CE be lines drawnfrom the three angles perpendicularto the opposite sides, they will allintersect at the point H. Join thepoints D, E, F. This will form atriangle of which H is the in-centre, being the…
Geometrical drawing · Design · Drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
