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廣義三角：sin, cos
Author:
羅驥韡 (Pegasus Roe)
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正方形与内外弦图
圆的渐开线
未命名
龍騰4-1拋物線習題8
[洋蔥] 双垂图与全等(0544)
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圓形墊圈 (Washer)
角α与-α的正弦函数关系
正三角形內一點到三頂點的距離
阿波羅尼奧斯圓
happy planet
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Percentages
Sequences and Series
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Calculus
