Right angle
The right angle = 1/4 full circle = 3/2 babylonian unit = π/2 rad = 100 gon = 90° is the unit used in Euclid's Elements.
- Degrees90
- Radians1.57
- Circle0.25
- Turn0.25
- Cycle0.25
- Rotation0.25
- Revolution0.25
- Right angle1
- Mil (NATO)1,600
- Mil (Soviet Union)1,500
- Mil (Sweden)1,575
- Grad100
- Gon100
- Point8
- Hour angle6