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Drawing quadrilaterals on the grid or the pinboard
Author:
Anthony OR 柯志明
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
四邊形的特性
四邉形 (四年級) 教師版
三位數除以一位數（一）
異分母分數減法
Discover Resources
glt-c02-09 五角柱旋轉
正方體和長方體體積計算公式
九點圓
CIRCLE
拋物線1-焦點法
Discover Topics
Secant Line or Secant
Solids or 3D Shapes
Addition
Circumcircle or Circumscribed Circle
Unit Circle