περιοδος και κυκλος

Question

&epsilon;&delta;ώ &kappa;&alpha;&iota; 5 &mu;ή&nu;&epsilon;&sigmaf; &omicron; &kappa;ύ&kappa;&lambda;&omicron;&sigmaf; &mu;&omicron;&upsilon; &epsilon;ί&nu;&alpha;&iota; 20 &mu;έ&rho;&epsilon;&sigmaf; &kappa;&alpha;&iota; &eta; &delta;&iota;ά&rho;&kappa;&epsilon;&iota;&alpha; &tau;&eta;&sigmaf; &pi;&epsilon;&rho;&iota;ό&delta;&omicron;&upsilon; &sigma;&chi;&epsilon;&delta;ό&nu; 2 &epsilon;&beta;&delta;&omicron;&mu;ά&delta;&epsilon;&sigmaf; ό&pi;&omicron;&upsilon; &tau;&eta;&nu; 1&eta; &epsilon;&beta;&delta;&omicron;&mu;ά&delta;&alpha; έ&chi;&omega; &pi;&omicron;&lambda;&upsilon; &lambda;ί&gamma;&omicron; &alpha;ί&mu;&alpha;, &epsilon;ί&mu;&alpha;&iota; 29 &epsilon;&tau;ώ&nu; &epsilon;ί&chi;&alpha; &kappa;ά&nu;&epsilon;&iota; &pi;&alpha;&lambda;&iota;ό&tau;&epsilon;&rho;&alpha; &epsilon;&xi;&epsilon;&tau;ά&sigma;&epsilon;&iota;&sigmaf; &kappa;&alpha;&iota; &epsilon;ί&chi;&alpha;&nu; &delta;&epsilon;ί&xi;&epsilon;&iota; &epsilon;&lambda;&alpha;&phi;&rho;&iota;ά&sigmaf; &mu;&omicron;&rho;&phi;ή&sigmaf; &pi;&omicron;&lambda;&upsilon;&kappa;&upsilon;&sigma;&tau;&iota;&kappa;έ&sigmaf; &omega;&omicron;&theta;ή&kappa;&epsilon;&sigmaf; &alpha;&lambda;&lambda;ά &delta;&epsilon;&nu; ή&theta;&epsilon;&lambda;&alpha; &nu;&alpha; &pi;&alpha;ί&rho;&nu;&omega; &chi;ά&pi;&iota;&alpha; &kappa;&alpha;&iota; &omicron;&iota; &gamma;&upsilon;&nu;&alpha;&iota;&kappa;&omicron;&lambda;ό&gamma;&omicron;&iota; &mu;&omicron;&upsilon; &epsilon;ί&chi;&alpha;&nu; &pi;&epsilon;&iota; &nu;&alpha; &mu;&eta;&nu; &alpha;&nu;&eta;&sigma;&upsilon;&chi;ώ. &mu;&iota;&kappa;&rho;ή &alpha;&sigma;&tau;ά&theta;&epsilon;&iota;&alpha; &kappa;ύ&kappa;&lambda;&omicron;&upsilon; &epsilon;ί&chi;&alpha; &gamma;&epsilon;&nu;&iota;&kappa;ά &pi;ά&nu;&tau;&omicron;&tau;&epsilon; &alpha;&lambda;&lambda;ά &pi;&rho;ώ&tau;&eta; &phi;&omicron;&rho;ά &sigma;&upsilon;&mu;&beta;&alpha;ί&nu;&epsilon;&iota; &alpha;&upsilon;&tau;ό.  &tau;&iota; &mu;&epsilon; &sigma;&upsilon;&mu;&beta;&omicron;&upsilon;&lambda;&epsilon;ύ&epsilon;&tau;&epsilon;?