Complementary angles
Complementary angles are two angles that when their measurements are added together is equal to 90 degrees.
Complementary Angles Media
A green angle formed by two red rays on the Cartesian coordinate system
Angles A and B are a pair of vertical angles; angles C and D are a pair of vertical angles. Hatch marks are used here to show angle equality.
Angles A and B are adjacent.
The complementary angles a and b (b is the complement of a, and a is the complement of b).
The angles a and b are supplementary angles.
Angles AOB and COD are conjugate as they form a complete angle. Considering magnitudes, 45° + 315° = 360°.
Internal and external angles.
The measure of angle θ is sr radians.
Definition of 1 radian
The angle between the two curves at P is defined as the angle between the tangents A and B at P.
