| revolution | 1 r | 2 r | 3 r | 4 r | 5 r | 6 r | 7 r | 8 r | 9 r | 10 r | 11 r | 12 r | 13 r | 14 r | 15 r | 16 r | 17 r | 18 r | 19 r | 20 r | 21 r | 22 r | 23 r | 24 r | 25 r | 26 r | 27 r | 28 r | 29 r | 30 r | 31 r | 32 r | 33 r | 34 r | 35 r | 36 r | 37 r | 38 r | 39 r | 40 r | 41 r | 42 r | 43 r | 44 r | 45 r | 46 r | 47 r | 48 r | 49 r | 50 r | 51 r | 52 r | 53 r | 54 r | 55 r | 56 r | 57 r | 58 r | 59 r | 60 r | 61 r | 62 r | 63 r | 64 r | 65 r | 66 r | 67 r | 68 r | 69 r | 70 r | 71 r | 72 r | 73 r | 74 r | 75 r | 76 r | 77 r | 78 r | 79 r | 80 r | 81 r | 82 r | 83 r | 84 r | 85 r | 86 r | 87 r | 88 r | 89 r | 90 r | 91 r | 92 r | 93 r | 94 r | 95 r | 96 r | 97 r | 98 r | 99 r | 100 r |
| helf circle | 2 1/2 circle | 4 1/2 circle | 6 1/2 circle | 8 1/2 circle | 10 1/2 circle | 12 1/2 circle | 14 1/2 circle | 16 1/2 circle | 18 1/2 circle | 20 1/2 circle | 22 1/2 circle | 24 1/2 circle | 26 1/2 circle | 28 1/2 circle | 30 1/2 circle | 32 1/2 circle | 34 1/2 circle | 36 1/2 circle | 38 1/2 circle | 40 1/2 circle | 42 1/2 circle | 44 1/2 circle | 46 1/2 circle | 48 1/2 circle | 50 1/2 circle | 52 1/2 circle | 54 1/2 circle | 56 1/2 circle | 58 1/2 circle | 60 1/2 circle | 62 1/2 circle | 64 1/2 circle | 66 1/2 circle | 68 1/2 circle | 70 1/2 circle | 72 1/2 circle | 74 1/2 circle | 76 1/2 circle | 78 1/2 circle | 80 1/2 circle | 82 1/2 circle | 84 1/2 circle | 86 1/2 circle | 88 1/2 circle | 90 1/2 circle | 92 1/2 circle | 94 1/2 circle | 96 1/2 circle | 98 1/2 circle | 100 1/2 circle | 102 1/2 circle | 104 1/2 circle | 106 1/2 circle | 108 1/2 circle | 110 1/2 circle | 112 1/2 circle | 114 1/2 circle | 116 1/2 circle | 118 1/2 circle | 120 1/2 circle | 122 1/2 circle | 124 1/2 circle | 126 1/2 circle | 128 1/2 circle | 130 1/2 circle | 132 1/2 circle | 134 1/2 circle | 136 1/2 circle | 138 1/2 circle | 140 1/2 circle | 142 1/2 circle | 144 1/2 circle | 146 1/2 circle | 148 1/2 circle | 150 1/2 circle | 152 1/2 circle | 154 1/2 circle | 156 1/2 circle | 158 1/2 circle | 160 1/2 circle | 162 1/2 circle | 164 1/2 circle | 166 1/2 circle | 168 1/2 circle | 170 1/2 circle | 172 1/2 circle | 174 1/2 circle | 176 1/2 circle | 178 1/2 circle | 180 1/2 circle | 182 1/2 circle | 184 1/2 circle | 186 1/2 circle | 188 1/2 circle | 190 1/2 circle | 192 1/2 circle | 194 1/2 circle | 196 1/2 circle | 198 1/2 circle | 200 1/2 circle |
A revolution is a unit of angle equal to 360°, defined as a complete turn around a circle. Plural name is revolutions.
| 1 revolutions = 2 helf circles | 6 revolutions = 12 helf circles |
| 2 revolutions = 4 helf circles | 7 revolutions = 14 helf circles |
| 3 revolutions = 6 helf circles | 8 revolutions = 16 helf circles |
| 4 revolutions = 8 helf circles | 9 revolutions = 18 helf circles |
| 5 revolutions = 10 helf circles | 10 revolutions = 20 helf circles |
1/2 circle or half circle is equal to 360°/2 = 180°. Plural name is helf circles.
| 1 helf circles = 0.5 revolutions | 6 helf circles = 3 revolutions |
| 2 helf circles = 1 revolutions | 7 helf circles = 3.5 revolutions |
| 3 helf circles = 1.5 revolutions | 8 helf circles = 4 revolutions |
| 4 helf circles = 2 revolutions | 9 helf circles = 4.5 revolutions |
| 5 helf circles = 2.5 revolutions | 10 helf circles = 5 revolutions |
| 1 revolutions = 2 helf circles |
| 1 helf circles = 0.5 revolutions |