Higbee, F. G · New York, John Wiley & Sons · leaf 211
To draw a line tangent to two given circles. Let MANB be one circle and CD the other circle to which theline is to be drawn tangent. Draw PO connecting the centers.Lay off NI equal to PD and describe the circle HIJK. Thiscircle is equal in radius to the difference between the radii of thetwo given… … from P to the circle HIJK. Extend OH to cut the given circleat A and extend OJ to cut at B. A and B will be the points of tangency and AC and BD drawnfrom these points parallel toHP and JB will be the two Uneswhich may be drawn tangent tothe two given circles. To draw an ellipse by tram-mels, given…
Geometry, Descriptive
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