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與三半圓相切之圓填色
Author:
葉冠和
GeoGebra
New Resources
四邉形 (四年級) 教師版
三位數除以一位數（二）
拼砌四邊形
判斷球體
兩位數加法
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中線平方定理在圓上應用
angles sum on a striaght line
第四冊4-1習題8(1)
semops_圓錐
圓心角
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Histogram
Natural Numbers
Numbers
Prism
Rhombus