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
What a Beautiful Name is "Oceans (Where Feet May Fail)" and was released by another Hillsong unit, Hillsong United. "Oceans" led the Hot Christian chart for 61 weeks. The song has stayed on the chart for 77 weeks, making it the third longest running song on the chart. "What a Beautiful Name" is ranked as the No. 1 song of the year for 2017 on the Christian Digital Sales chart, No. 3 on Christian Streaming Songs, and is also the No. 3 song on Christian Airplay. The song spent nine weeks as No. 1 on Christian Airplay and was Hillsong Worship's first No. 1