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 What a Beautiful Name "What a Beautiful Name" is a song by Australian praise and worship group Hillsong Worship. The song, written and led by Brooke Ligertwood and co-written with Ben Fielding, refers to the promise of salvation through Jesus Christ as represented by His Holy Name. The "genre-smashing single" contributed to Hillsong being named "Billboard"s Top Christian Artist of 2017. "What a Beautiful Name" won two Dove Awards for Song of the Year and Worship Song of the Year in 2017. It won the 2018 Grammy Award for Best Contemporary Christian Music Performance/Song. "What a Beautiful Name" was released