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２次不等式の解き方
Author:
嶋津恒彦
GeoGebra
New Resources
standingwave-reflection
standingwave-reflection-fixed
小テスト
円の伸開線
直線の軌跡
Discover Resources
円周角と中心角（a circumferential angle and a central angle）
Σ（x_i-Σｘ_i/n）のχ二乗分布
throwing
フェルマー点の証明
円周角 for mobile(Angles at Circumference)
Discover Topics
LCM and GCD
Square
Rectangle
Solids or 3D Shapes
Pythagoras or Pythagorean Theorem