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解三角形（１）
Author:
蔡永志
Topic:
Triangles
,
Trigonometry
解三角形
GeoGebra
New Resources
兩組對邊相等的四邊形
三位數除以一位數（一）
拼砌四邊形
錐體建築師
判斷球體
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平行四邊形面積教材二
量度長度(厘米)
Pyth. theorem
典斜式2 施云淇09
【案例】2018年全国1卷理科12题
Discover Topics
Rectangle
Pyramid
Orthocenter
Similar Triangles
Tangent Line or Tangent