Circle - The set of all points that are the same distance from a center point., Diameter - The line (distance) across the circle, through the center., Radius - The line from the center to the outside point on a circle. Half the diameter., Pi - The ratio of the circumference to the diameter.  , Circumference - The distance around a circle. 2ℼr OR ℼd,

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?