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正弦定理的验证
Author:
junfeilx
GeoGebra
New Resources
拼砌四邊形
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
柱體建築師
找出對稱軸
Discover Resources
Lagrange
定积分的概念（移动端）
Percentage Change(百分變化)
美國隊長
点、线、角
Discover Topics
Logarithm
Correlation
Statistical Characteristics
Trigonometric Functions
Triangles