關於「arc是什麼數學」標籤，搜尋引擎有相關的訊息討論：

ARC_百度百科baike.baidu.com › item › ARCTI Education - 圓弧和扇形(Arc Length and Sectors)... - Facebookwww.facebook.com › TIEducation › posts › 圓弧和扇形-arc-length-and-se...TI Education - 圓弧和扇形(Arc Length and Sectors)... - Facebookwww.facebook.com › TIEducation › posts › 圓弧和扇形-(arc-length-