By definition, pi is the ratio of the circumference of a circle to its diameter. Pi is always the same number, no matter which circle you use to compute it. For the sake of usefulness people often need to approximate pi.
Definition and Examples of Literary Terms. The term palindrome is derived from two Greek words âpalinâ means again and âdromosâ means way or direction. It is defined as a number, a word, a sentence, a symbol or even signs that can be read forward as well as backward or in reserve order with the same effects and meanings.
The word river is not a palindrome; spelled in reverse, river is revir. This doesn't work.A palindrome is a word or a sentence that is spelled the same forward or backward, like 'radar'. In sentence form, the word breaks do not have to be in the same places when reversed.Famous examples are: Able â¦.