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全等三角形
Author:
孟宝兴
GeoGebra
New Resources
異分母分數減法
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
四邉形 (四年級) 教師版
拼砌四邊形
Discover Resources
構成三角形的邊長條件
佑玟ggb book
Hoehn's Theorem
圓與直線距離
「相似三角形」任务4的副本
Discover Topics
Function Graph
Ratios
LCM and GCD
Unit Circle
Statistics