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圓內接四邊形任務二：提示一
Author:
Stanley Mak
GeoGebra
New Resources
Nested spiral octagon
第八周作业
小数 的副本
畫出對稱圖形
兩組對邊相等和有直角的四邊形
Discover Resources
TESTTT
Quiz on Solving Right Triangles (Finding Side Lengths) 解直角三角形：測驗1（求邊長）
Hyperbolic Spiral
圓周_心算題02
连续开方（制作：谢建华，修订：孟宝兴）
Discover Topics
Triangles
Variance
Trigonometry
Function Graph
Vectors 2D (Two-Dimensional)