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同旁內角
Author:
maths324324
GeoGebra
New Resources
判斷球體
柱體建築師
兩位數除以一位數（一）
三位數除以一位數（一）
拼砌四邊形
Discover Resources
Venn diagram
三心：與三角形形狀的關係
菱形
Magic Matches
再作万年历单晨
Discover Topics
Right Triangles
Fractions
Pie Chart or Circle Chart
Random Variables
Parallelogram