There are [[Angle (astrology)|four primary angles]] in the horoscope. There are six possibilities of choosing the rotation axes for proper Euler angles. So the sum of the angles in this triangle is . Triangles with three equal angles (AAA) are similar, but not necessarily congruent. The two axes divide the plane into four right angles, called "quadrants". There are now lights illuminating it from many different angles. Denote the dihedral angles by formula 58 etc. The characters are rendered as sprites portrayed from sixteen different angles. A rectangle is a quadrilateral with four right angles. Hence the three Euler Angles can be calculated. This technique helps improve the viewing angles of the display. Unpolarized light is composed of incoherent light waves with random polarization angles. The mathematics of the relationship between joint angles and actual spatial coordinates is called kinematics. Geometrically, these are identities involving certain functions of one or more angles. Animatics were used to map out the necessary camera angles for filming.