Let z = e2π i /n. then zn = 1, and z is called an nth root of unity. there are n nth roots of unity, equispaced around the unit circle; they have the form z = e2π i (k/n), where k = 0, 1, 2, , n−1. of course 1 is an nth root of unity, for every n. draw the unit circle for the four 4th roots of unity. the angle difference (in radians) between adjacent 4th roots is correct: your answer is correct. draw the unit circle for the six 6th roots of unity. the angle difference (in radians) between adjacent 6th roots is correct: your answer is correct. draw the unit circle for the eight 8th roots of unity. the angle difference (in radians) between adjacent 8th roots