Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 88
les. If a triangle ABC be taken, and AF, BD, and CE,drawn from the three anglesperpendicular to the oppositesides, they will all intersectat the point H. Join thepoints D, E, E. This will forma triangle of which H isthe in centre, being thecentre of the inscribed circle.The centres of the… … Problem 95. To dravj two circles tangential to three given straight lines,tivo of ivhich are i^arallel. Let AB and CD be thetwo given parallel lines, andlet the third line intersectthem in E and F. Bisectthe four angles AEF, BEE,CEE, and DEE by linesmeeting at H and L. EromH draw the line HM…
Geometrical drawing
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