Right Angle
An angle which is equal to 90°, one quarter of a full revolution.
Also equal to π/2 radians.
See: Radian
- analog
- analog clock or watch
- analogy
- and
- angle
- angle bisector
- angle of depression
- angle of elevation
- annual
- annual percentage rate (apr)
- annual percentage yield (apy)
- annulus
- anticlockwise
- antiprism
- apex
- apothem
- approximation
- arc
- arc length
- area
- argand diagram
- argument
- arithmetic
- arithmetic mean
- arithmetic progression