Kobongola 90°

Ndambo ya $\displaystyle \frac{1}{4}$ ya cercle ezali $\displaystyle 90^{\circ}$, $\displaystyle \frac{\pi}{2}$ na radians, to $\displaystyle 100$ grades. 2nd F mpe bouton ya point décimal ezali D R G: ebongolaka motuya oyo ezali na écran na unité ya angle oyo elandi. Bofina , bokoma 90, na sima mpe . $\displaystyle 90^{\circ}$ ezali $\displaystyle \dfrac{1}{2}\pi$ na radians. Lisusu , : 100. grades. Mpe lisusu , : kozonga na 90. degrés.