law of quadrants

law of quadrants

[′lȯ əv ′kwäd·rəns]
(mathematics)
The law that any angle of a right spherical triangle (except a right angle) and the side opposite it are in the same quadrant.
The law that when two sides of a right spherical triangle are in the same quadrant the third side is in the first quadrant, and when two sides are in different quadrants the third side is in the second quadrant.