From Wikipedia, the free encyclopedia
象限(英文Quadrant)係指座標中嘅區域。用 x,y 座標嚟講,有4個象限,分別叫做第一象限、第二象限、第三象限同埋第四象限,象限中文叫法嚟自四象。
座標軸唔屬於任何象限。
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