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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
フーリエ級数展開
standingwave-plus
接点の作る円は内接円
円の伸開線
standingwave-reflection-fixed
Discover Resources
数学Ⅱ・三角関数
中点多角形
二次曲面の接平面
テスト解説2017 11月
いろいろな立体
Discover Topics
Line Segment
Interest Calculation
Distributions
Quadratic Functions
Addition