KhATI ROST, yak mafhumi asosii geometriyaro guyand. Hangomi az nuqtai nazari geometriya bayon kardani yagon hodisa khati rost chun yak mafhumi ibtidoi istifoda meshavad.
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SATHI VINTI
SATHI VINTI, sathest, ki khati £ hangomi dar girdi mehvari nojunboni OO’ bo surati kunjii …