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The turn (symbol tr or pla) is a unit of plane angle measurement that is the measure of a complete angle—the angle subtended by a complete circle at its center. One turn is equal to 2π radians, 360 degrees or 400 gradians. As an angular unit, one turn also corresponds to one cycle (symbol cyc or c) [1] or to one revolution (symbol rev or r). [2]
A 540 crescent kick. In martial arts and tricking, [1] [2] the 540 kick (Chinese: 旋風腳; pinyin: Xuanfengjiao; lit. 'whirlwind kick') (also known as inside turning kick, jump inside kick, and "hyper" tornado kick) is a jump kick move. [3]
Traditional Chinese visual design elements: their applicability in contemporary Chinese design (Master of Science in Design thesis). Arizona State University. Welch, Patricia Bjaaland (2012). Chinese art : a guide to motifs and visual imagery. Boston, US: Tuttle Publishing. ISBN 978-1-4629-0689-5. OCLC 893707208. Williams, Charles (2006).
A loop is when the pilot pulls the plane up into the vertical, continues around until they are heading back in the same direction, like making a 360 degree turn, except it is in the vertical plane instead of the horizontal. The pilot will be inverted (upside down) at the top of the loop.
On the way up, from the bottom to the top of the loop, gravity is in opposition to the direction of the cars and will slow the train. The train is slowest at the top of the loop. Once beyond the top, gravity helps to pull the cars down around the bend. If the loop's curvature is constant, the rider is subjected to the greatest force at the bottom.
An angle larger than a straight angle but less than 1 turn (between 180° and 360°) is called a reflex angle. An angle equal to 1 turn (360° or 2 π radians) is called a full angle, complete angle, round angle or perigon. An angle that is not a multiple of a right angle is called an oblique angle.
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The cup is rotated by its handle through a full twist of 360°, so that the handle is brought all the way around the central vertical axis of the cup and back to its original position. Note that after this rotation, the cup has been returned to its original orientation, but that its orientation with respect to the walls is twisted .