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円錐の展開（側面積を視覚でつかむ）
Author:
holon
Topic:
Area
,
Cone
,
Geometry
,
Solids or 3D Shapes
GeoGebra
New Resources
standingwave
サイクロイド
アステロイド
直線の軌跡
正１７角形 作図 regular 17-gon
Discover Resources
logistic regression
（sinθ）’＝cosθ
bibun1
基本の絵その２
数学Ⅲ分数不等式③
Discover Topics
Scalene Triangles
Ratios
Polygons
Probability
Line Segment