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展開圓面積 (講義版)的副本
Author:
黄立新
,
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
兩組對邊相等的四邊形
異分母分數減法
拼砌四邊形
兩位數除以一位數（二）
兩位數除以一位數（一）
Discover Resources
rainbow
Shen Kuo Frustum
congruent (SSA, RHS)
三角形的三心
动圆与两圆外切与内切(2)
Discover Topics
Calculus
Numbers
Conditional Probability
Pie Chart or Circle Chart
Sine