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 84
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 … erect perpendicular to AB cutting the arc in D. Join AD.Make the angle DAE equal to DAC. Then EA produced isthe tangent required. Problem 87. To clravj a given circle ivith radius egiial to line 1) to touch ticostraight lines forming a given angle ABC.
Geometrical drawing
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