Roulette (curve) in this case, the point lies on the circle then the roulette is a cycloid. A related concept is a glissette, the curve described by a point attached to a given curve as it slides along two (or more) given curves. Formally speaking, the curves must be differentiable curves in the Euclidean plane. The "fixed curve" is kept invariant; the "rolling curve" is subjected to a continuous congruence transformation such that at all times the curves are tangent at a point of contact that moves with the same speed when taken along either curve (another way to express this constraint
Diary of a Wimpy Kid: The Third Wheel Diary of a Wimpy Kid: The Third Wheel Diary of a Wimpy Kid: The Third Wheel is a 2012 bestselling children's novel and the seventh book in the Diary of a Wimpy Kid series, written by American author Jeff Kinney. Kinney announced the book in March 2012, with "The Third Wheel"s cover revealed in May 2012. The book was released on November 13, 2012. Greg recalls several anecdotes from the time of his conception to his preschool years, notable ones include how his mother read to him before bed, how his parents’ excessive kissing supposedly led to his premature birth,