Let L and N be adjacent cusps of a cycloid.
Let P be a point on the cycloid between L and N.

Construct with straightedge and compass the tangent line to the cycloid at point P.

(In reply to Solution by Harry)

"Draw an arc with centre at P and radius equal to KC,..."

With the straightedge having no markings and the compass collapsing when lifted from the surface (as is the definition of using only a straightedge and compass), how are you determining the radius equal to KC for the arc to be drawn with centre at P?

Posted by Dej Mar on 2010-01-11 17:27:36