There are strong connections between numerology and triangles probably due to the influence of Pythagoras. Most people would be aware of his theorem relating to right-angled triangles but not the following formula which calculates the area of any triangle.

Area ∆ = 1/4 √ [(a+b+c)(b+c-a)(a+b-c)(a+c-b)]

The numerological theory goes that if the sides (a, b and c) correspond to the day of month of the mother, father and querent then ∆ has huge numerological significance. There will be occasions where no triangle can be determined, ie when a+b < c, in these cases we need to dive into the abstract world of imaginary numbers.

For a querent who's mother was born on 24th day of the month, father born on 23rd day of the month and they themselves born on 15th day of the month, the calculation is as follows:

Area ∆ = 1/4 √ [62 x 16 x 32 x 14] = 166 (rounded to the lower whole number)

Obviously, because this number is derived from birth dates it remains fixed throughout the life of the querent.

Using reduction this result can be reduced to 4, hence for this querent the divine triangle coefficient ∆ = 4. Using modulus, this result can be equated to a card of the major arcana. Taking [166 mod 22] = 12 which equates to The Hanged Man. In the situation where a+b < c mentioned above, the triangle is not bounded in the physical plane but is bounded in the imaginary plane. Mathematicians have a concept called an imaginary number i, where

i² = -1

For a querent who's mother was born on 30th day of the month, father born on 6th day of the month and they themselves born on 23rd day of the month, the calculation is as follows:

Area ∆ = 1/4 √ [59 x (-1) x 13 x 47] = 47i, (rounded to the lower whole number)

To work out the associated major arcana card we first sum all the numbers to 47 which equals 1128, then apply modulus 22 to this result leaving a number between 0 and 21, in this example the result is 6 which equates to the Lovers card.