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正四面体の内接球の半径 のコピー
Author:
yaakane1218
,
嶋津恒彦
New Resources
standingwave-reflection-free
アステロイド
standingwave-plus
コイン投げと樹形図
サイクロイド
Discover Resources
デュドニーの三角形 The Haberdasher's Puzzle
ピタゴラスの定理とその拡張
fold-out1
Hayabusa2Swingby
M_iwate_2018_01
Discover Topics
Tree Diagrams
Perimeter
Quadrilaterals
Subtraction
Plane Figures or Shapes