In bringing the chisel into contact with the revolving surface, the mathematical principle of the "point of tangency" is illustrated.
"A Course In Wood Turning"
Archie S. Milton and Otto K. Wohlers
Lift the handle and force the cutting edge into the wood; at the same time push the chisel forward to keep it at the proper tangency.
"A Course In Wood Turning"
Archie S. Milton and Otto K. Wohlers
It is not certain, for instance, whether Euclid meant that the circles could not cut at some other point than that of tangency.
"The Teaching of Geometry"
David Eugene Smith