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圆锥的侧面展开图3D动画的副本
Author:
吉顺国
拖动点C
圆锥的侧面展开图是三角形吗?
New Resources
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
異分母分數減法
【案例】2018年全国1卷理科12题
Discover Resources
謝爾賓斯基三角形 (Sierpinsky)
拿破崙三角形(費馬點)
極線獨立定理 / polar independence theorem
Copy of 幾何分布 (Geometric Distribution)
弦心距
Discover Topics
Circumcircle or Circumscribed Circle
Cuboid
Planes
Interest Calculation
Variance