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Outline
CollectionA
Area of Circles
Geometric workshop for primary school
CollectionA
Author:
Y.Gyotoku
Area of Circles
Geometric workshop for primary school
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Area of Circles
New Resources
二次曲線と離心率
対数螺旋
アステロイド
正１７角形 作図 regular 17-gon
コイン投げと樹形図
Discover Resources
類似重心（ルモアーヌ点）の作り方
逆垂足三角形=傍心三角形
数3４タイトルなし
体5_179_rd1
ともなって動く点のえがく図形45
Discover Topics
Matrices
Natural Numbers
Continuity
Subtraction
Mathematics
