Rekitangula → pola, kwadranti yachitatu

Kadontho ka mu kwadranti yachitatu: $\displaystyle x = -3$, $\displaystyle y = -2.5$. Nambala ya negetivu imayamba ndi (-), osati −. Dinani ndi kuti mupeze Pol, kenako ndi 3. Dinani ndi kuti mupeze koma, kenako ndi 2.5. Dinani ndi . $\displaystyle r$ ndi r=3.905124838, ndipo $\displaystyle \theta$ ndi madigiri θ=−140.1944289. Ngodya ndi ya negetivu chifukwa imayezedwa motsata wotchi: $\displaystyle \theta$ nthawi zonse imakhala pakati pa $\displaystyle -180^{\circ}$ ndi $\displaystyle 180^{\circ}$.

▶ Onani sitepe iyi mu vidiyo (48:45)