1/2PI--------------90°
2,42PI---------------X° 2,42PIX90° SOBRE 0,5PI= 435°36'
90°----------------1/2PI
38°13'12" -------------X 38°13'12" .172PI SOBRE 90° = 637/3000 PI
1/2PI----------90°
7/3PI-----------X° 7/3PI X90° SOBRE1/2PI = 420°
90°-------------1/2PI
22°30'-------XpI 22°30' X1/2PI SOBRE90°= 1/8PI