Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 75
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 centre of theinscribed circle.… … Fig. 132. as the 62 GEOMETRICAL DRAWING AND DESIGN. 95. To draw two circles tangential to three given straight lines,two of which are parallel. Let AB and CD be the two givenparallel lines, and let the third lineintersect them in E arid F. Bisectthe four angles AEF, BEF, CFE,and DFE by lines…
Geometrical drawing · Design · Drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
