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海伦公式分步证明
Author:
math Ku
Topic:
Area
,
Similar Triangles
,
Triangles
Prove Heron's Formula
GeoGebra
New Resources
兩位數加法
球体的体积推导（优化版）
漂亮的摇摆曲线
祖冲之的期望：内棋与外棋
兩位數除以一位數（一）
Discover Resources
愛上貝氏曲線 (Love for Bezier)
Translation, Reflection and Rotation
(007)80102
雙曲線2-焦點法
序列（圆内弦）
Discover Topics
Variance
Integers
LCM and GCD
Parabola
Complex Numbers