11 1123 23trinity          3triad           

11 11

23 23

trinity          3

triad            Ʒ

triptych        ३

• the number of non-collinear points needed to determine a plane and a circle.
• the first odd prime number and the second smallest prime.
  
• the second triangular number. It is the only prime triangular number.
  
• the smallest number of sides that a simple (non-self-intersecting) polygon can have.
  

the smallest odd prime number and the only prime preceding a square number

Any three points in a space will be coplanar; that is, a plane can be identified which contains all three points.

According to Pythagoras and the Pythagorean school, the number 3, which they called triad, is the noblest of all digits, as it is the only number to equal the sum of all the terms below it, and the only number whose sum with those below equals the product of them and itself.

The triangle, a polygon with three edges and three vertices, is the most stable physical shape.

Creator

Preserver

Destroyer

In arithmetic and algebra, the cube of a number n is its third power, that is, the result of multiplying three instances of n together.

Sums of three cubes