Perpendicular
At right angles (90°) to.
The symbol is ⊥
Try for yourself:
See: Parallel
- alternate interior angles
- alternating series
- altitude
- altitude (geometry)
- am
- amplitude
- 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