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CBSE Class 7 Answered

WHY PI IS NOT A RATIONAL NUMBER?
Asked by okpsajitha | 17 Feb, 2015, 01:58: PM
answered-by-expert Expert Answer
P i space i s space d e n o t e d space b y space t h e space g r e e k space l e t t e r space straight pi. Pi space is space the space ratio space of space the space circumference space of space the space circle space to space its space diameter. Thus comma space straight pi equals straight C over straight d And space straight pi space cannot space be space expressed space as space the space ratio space of space two space integers. T h e space a p p r o x i m a t e space v a l u e space o f space p i space i s space e q u a l space t o straight pi equals 3.14159265358979....... Here space the space digits space after space the space decimal space point space are space non minus repeating space and space non minus terminating. straight A space raional space number space can space be space expressed space in space the space form space straight p over straight q comma space where space straight q not equal to 0 Since space straight pi space cannot space expressed space in space the space form space straight p over straight q space and space for space the space above space reasons comma space straight pi space is space an space irrational space number. straight pi equals 22 over 7 space is space an space approximate space value.
Answered by Vimala Ramamurthy | 18 Feb, 2015, 08:36: AM

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