Horizontal lines run left to right, parallel to the horizon, with slope 0 and equation y = k. Vertical lines run top to bottom, perpendicular to the horizon, with undefined slope and equation x = k.
Tá torthaí a d'fhéadfadh a bheith dorochtana agat á dtaispeáint faoi láthair.
Folaigh torthaí dorochtana
Aiseolas