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圓周 (圖形A)
Author:
Keith Ko
移動右圖中的紅線到左方虛線，就知道它是相等於左圖的哪條線。
New Resources
王二星际全能元素人---2019
penrose triangle
三垂線定理
扇形在射线上滚动
jap000
Discover Resources
指數與對數
四角柱算體積
塗色02
Wave Interference
Corr Angles on NonParallel Lines
Discover Topics
Arithmetic Operations
Calculus
Linear Programming or Linear Optimization
Square
Arithmetic Mean
