The sum of the measures of two adjacent angles is 180 degrees.

The angle of depression from the top of the tower to the base of the tree is 45 degrees.

The angle of elevation of the airplane was 30 degrees.

The circular angle of the clock is 360 degrees.

Adjacent angles are two angles that share a common side and a common vertex.

The circular angles of the shape are all equal.

The hyperbolic angle of the triangle is 60 degrees.

The hyperbolic angles in the triangle were difficult to calculate.

The angles of depression were measured to determine the height of the building.

The director carefully considered the camera angles for each scene.