Kusintha 90°

Sinthani madigiri $\displaystyle 90^{\circ}$. Dinani , lembani 90, kenako dinani ndi . $\displaystyle 90^{\circ}$ ndi maradiyani 1.570796327, amene ndi $\displaystyle \frac{\pi}{2}$. Dinani ndi kachiwiri: magiradi 100.. Ndipo kamodzinso, , : tabwerera ku madigiri 90..

▶ Onani sitepe iyi mu vidiyo (35:16)