Report Abuse. Pi is the ratio of the circumference of a circle to its diameter. It cannot be written exactly as a decimal because it is a transcendental number; it's irrational. pi to 100 significant figures: 3.141592653589793238462643383279502884... 49445923078164062862089986280348253421...
transformation. n. 1. a change or alteration, esp a radical one. 2. the act of transforming or the state of being transformed. 3. (Mathematics) maths. a. a change in position or direction of the reference axes in a coordinate system without an alteration in their relative angle.
Symmetry occurs not only in geometry, but also in other branches of mathematics. Symmetry is a type of invariance: the property that something does not change under a set of transformations. Given a structured object X of any sort, a symmetry is a mapping of the object onto itself which preserves the structure. This occurs in many cases; for example, if X is a set with no additional structure, a symmetry is a bijective map from the set to itself, giving rise to permutation groups.