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厚會聚透鏡 Thick Convergent Lens
Author:
W.L. Wong, Albert
GeoGebra
New Resources
球体的体积推导
拼砌四邊形
四邊形的特性
錐體建築師
画直线等分三角形的面积
Discover Resources
橢圓軌跡 (2)
圓內接四邊形 ABCD ...，求 sinθ=?
平行四邊形
test
Classifying Quadrilaterals
Discover Topics
Incircle or Inscribed Circle
Linear Programming or Linear Optimization
Triangles
Function Graph
Cylinder