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[几何] 相切的圆, 求多种解法

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player1703 posted 2020-2-11 11:52 |Read mode

相切的圆

相切的圆

如图, $C_2$,$C_1$,$C_3$共线. 半径分别为2, 1的半圆$C_2$,$C_3$外切, 且内切半圆$C_1$. $\odot C_4$外切半圆$C_2$,$C_3$, 内切半圆$C_1$. 求$\odot C_4$半径.

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色k posted 2020-2-11 14:10
《撸题集》P.544 题目 4.7.44
青青子衿 posted 2020-2-11 16:56
回复 1# player1703
2452211165140.jpg

相关链接:鞋匠刀问题
bbs.emath.ac.cn/thread-4205-1-1.html

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色k posted 2020-2-11 18:05
回复 3# 青青子衿

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