the 180-degreeturnout, or rotation of the leg, featured in ballet allows for greater extension of the leg, especially when raising it to the side and rear?

Question 3: A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of plane________, representing ^{1}⁄_{360} of a full rotation; one degree is equivalent to π/180 radians.

Question 5: With the invention of the ________, based on powers of ten, there was an attempt to define a "decimal degree" (grad or gon), so that the number of decimal degrees in a right angle would be 100 gon, and there would be 400 gon in a circle.

Question 6: When that angle is with respect to a reference meridian, it indicates a location along a great circle of a sphere, such as Earth (see ________), Mars, or the celestial sphere.