| helf circle | 1 1/2 circle | 2 1/2 circle | 3 1/2 circle | 4 1/2 circle | 5 1/2 circle | 6 1/2 circle | 7 1/2 circle | 8 1/2 circle | 9 1/2 circle | 10 1/2 circle | 11 1/2 circle | 12 1/2 circle | 13 1/2 circle | 14 1/2 circle | 15 1/2 circle | 16 1/2 circle | 17 1/2 circle | 18 1/2 circle | 19 1/2 circle | 20 1/2 circle | 21 1/2 circle | 22 1/2 circle | 23 1/2 circle | 24 1/2 circle | 25 1/2 circle | 26 1/2 circle | 27 1/2 circle | 28 1/2 circle | 29 1/2 circle | 30 1/2 circle | 31 1/2 circle | 32 1/2 circle | 33 1/2 circle | 34 1/2 circle | 35 1/2 circle | 36 1/2 circle | 37 1/2 circle | 38 1/2 circle | 39 1/2 circle | 40 1/2 circle | 41 1/2 circle | 42 1/2 circle | 43 1/2 circle | 44 1/2 circle | 45 1/2 circle | 46 1/2 circle | 47 1/2 circle | 48 1/2 circle | 49 1/2 circle | 50 1/2 circle | 51 1/2 circle | 52 1/2 circle | 53 1/2 circle | 54 1/2 circle | 55 1/2 circle | 56 1/2 circle | 57 1/2 circle | 58 1/2 circle | 59 1/2 circle | 60 1/2 circle | 61 1/2 circle | 62 1/2 circle | 63 1/2 circle | 64 1/2 circle | 65 1/2 circle | 66 1/2 circle | 67 1/2 circle | 68 1/2 circle | 69 1/2 circle | 70 1/2 circle | 71 1/2 circle | 72 1/2 circle | 73 1/2 circle | 74 1/2 circle | 75 1/2 circle | 76 1/2 circle | 77 1/2 circle | 78 1/2 circle | 79 1/2 circle | 80 1/2 circle | 81 1/2 circle | 82 1/2 circle | 83 1/2 circle | 84 1/2 circle | 85 1/2 circle | 86 1/2 circle | 87 1/2 circle | 88 1/2 circle | 89 1/2 circle | 90 1/2 circle | 91 1/2 circle | 92 1/2 circle | 93 1/2 circle | 94 1/2 circle | 95 1/2 circle | 96 1/2 circle | 97 1/2 circle | 98 1/2 circle | 99 1/2 circle | 100 1/2 circle |
| radian | 3.1415926 rad | 6.2831852 rad | 9.4247778 rad | 12.5663704 rad | 15.707963 rad | 18.8495556 rad | 21.9911482 rad | 25.1327408 rad | 28.2743334 rad | 31.415926 rad | 34.5575186 rad | 37.6991112 rad | 40.8407038 rad | 43.9822964 rad | 47.123889 rad | 50.2654816 rad | 53.4070742 rad | 56.5486668 rad | 59.6902594 rad | 62.831852 rad | 65.9734446 rad | 69.1150372 rad | 72.2566298 rad | 75.3982224 rad | 78.539815 rad | 81.6814076 rad | 84.8230002 rad | 87.9645928 rad | 91.1061854 rad | 94.247778 rad | 97.3893706 rad | 100.5309632 rad | 103.6725558 rad | 106.8141484 rad | 109.955741 rad | 113.0973336 rad | 116.2389262 rad | 119.3805188 rad | 122.5221114 rad | 125.663704 rad | 128.8052966 rad | 131.9468892 rad | 135.0884818 rad | 138.2300744 rad | 141.371667 rad | 144.5132596 rad | 147.6548522 rad | 150.7964448 rad | 153.9380374 rad | 157.07963 rad | 160.2212226 rad | 163.3628152 rad | 166.5044078 rad | 169.6460004 rad | 172.787593 rad | 175.9291856 rad | 179.0707782 rad | 182.2123708 rad | 185.3539634 rad | 188.495556 rad | 191.6371486 rad | 194.7787412 rad | 197.9203338 rad | 201.0619264 rad | 204.203519 rad | 207.3451116 rad | 210.4867042 rad | 213.6282968 rad | 216.7698894 rad | 219.911482 rad | 223.0530746 rad | 226.1946672 rad | 229.3362598 rad | 232.4778524 rad | 235.619445 rad | 238.7610376 rad | 241.9026302 rad | 245.0442228 rad | 248.1858154 rad | 251.327408 rad | 254.4690006 rad | 257.6105932 rad | 260.7521858 rad | 263.8937784 rad | 267.035371 rad | 270.1769636 rad | 273.3185562 rad | 276.4601488 rad | 279.6017414 rad | 282.743334 rad | 285.8849266 rad | 289.0265192 rad | 292.1681118 rad | 295.3097044 rad | 298.451297 rad | 301.5928896 rad | 304.7344822 rad | 307.8760748 rad | 311.0176674 rad | 314.15926 rad |
1/2 circle or half circle is equal to 360°/2 = 180°. Plural name is helf circles.
| 1 helf circles = 3.1415926 radians | 6 helf circles = 18.8495556 radians |
| 2 helf circles = 6.2831852 radians | 7 helf circles = 21.9911482 radians |
| 3 helf circles = 9.4247778 radians | 8 helf circles = 25.1327408 radians |
| 4 helf circles = 12.5663704 radians | 9 helf circles = 28.2743334 radians |
| 5 helf circles = 15.707963 radians | 10 helf circles = 31.415926 radians |
The radian is the standard unit of angular measure, used in many areas of mathematics. The length of an arc of a unit circle is numerically equal to the measurement in radians of the angle that it subtends; one radian is just under 57.3 degrees.
| 1 radians = 0.31830989161357 helf circles | 6 radians = 1.9098593496814 helf circles |
| 2 radians = 0.63661978322714 helf circles | 7 radians = 2.228169241295 helf circles |
| 3 radians = 0.95492967484072 helf circles | 8 radians = 2.5464791329086 helf circles |
| 4 radians = 1.2732395664543 helf circles | 9 radians = 2.8647890245221 helf circles |
| 5 radians = 1.5915494580679 helf circles | 10 radians = 3.1830989161357 helf circles |
| 1 helf circles = 3.1415926 radians |
| 1 radians = 0.3183099 helf circles |