Algebra is not a mathematical technique used in astrological analysis. Geometry, trigonometry, and statistics are all used to interpret astrological charts.

The mathematical term for the angle between two planets in an astrological chart is aspect. Conjunction, opposition, and square are all types of aspects.

The mathematical term for the point in an astrological chart where two planets are in the same sign and degree is conjunction.

The mathematical term for the point in an astrological chart where two planets are in opposite signs and degrees is opposition.

The mathematical term for the point in an astrological chart where two planets are in signs that are 90 degrees apart is square.

The mathematical term for the point in an astrological chart where two planets are in signs that are 120 degrees apart is trine.

The mathematical term for the point in an astrological chart where two planets are in signs that are 150 degrees apart is quincunx.

The mathematical term for the point in an astrological chart where two planets are in signs that are 180 degrees apart is opposition.

The mathematical term for the point in an astrological chart where two planets are in signs that are 270 degrees apart is opposition.

The mathematical term for the point in an astrological chart where two planets are in signs that are 360 degrees apart is conjunction.

The mathematical term for the point in an astrological chart where the Sun is located is Midheaven.

The mathematical term for the point in an astrological chart where the Moon is located is Imum Coeli.

The mathematical term for the point in an astrological chart where the Ascendant is located is Ascendant.

The mathematical term for the point in an astrological chart where the Descendant is located is Descendant.

The mathematical term for the point in an astrological chart where the North Node of the Moon is located is North Node.