360 + 180 = 540
90 180 270 360 450 540 630 720 810 900 1080
90, 180, 270, 360, 450, 540, 630, 720, 810, 900, 990, 1080, . . .
108 x 10 = 1080 108 x 5 = 540 108 x 15 = 1080 + 540 = 1620
540 x (2/3) = 1080/3 = 360
180, 360, 540, 720, 900, 1080, 1260, 1440 . . .
180, 360, 540, 720, 900, 1080, 1260 +180 . . .
360 + 180 = 540
540.
Double 540 is 1080
90 180 270 360 450 540 630 720 810 900 1080
90, 180, 270, 360, 450, 540, 630, 720, 810, 900, 990, 1080, . . .
According to one possible rule, 80 is wrong and should be replaced by 30 and 90, making the sequence: 5, 15, 30, 90, 180, 540, 1080, ... with the rule "alternatively multiply by 3 and by 2 to get the next term".
The first 15 multiples of 180: 180, 360, 540, 720, 900, 1080, 1260, 1440, 1620, 1800, 1980, 2160, 2340, 2520, 2700 . . . ∞
180 360 540 720 900 1080 1260 1440 ect. Keep adding 180 to it and that's the next half rotation more above a 180
540 and 1080 have an LCM of 1080.
90, 180, 270, 360, 450, 540, 630, 720, 810, 900, 990, 1080, ..