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 83
o draw a tangent to a givencircle at a given jjoint A. Find the centre of the circleC (Prob. 33). Join AC. FromA draw the line AB perpen-dicular to AC, and produce it.Then AB is the tangent re-quired. Problem 85. To draw a tangent to a given circlefrom a given 2^oint A outside it. Find the centre C… … Fis. 149. .p. vi tangents and tangential arcs 63 Peoblem 86. To draio a tangent to the arc of a circle at a given point Awitliout using the centre. Draw the chord AB and bisect it in C (Prob. 1). At C
Geometrical drawing
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