以下是您的手绘内容转化为印刷体的版本：

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1.

x_1^2 + y_1^2 = r_1^2

2.

x_1^2 + z_1^2 = r_1^2

3.

x_2^2 + y_2^2 = r_2^2

4.

x_2^2 + z_2^2 = r_2^2

5.

y_2^2 + z_2^2 = r_2^2

6.

r_2^2 = 2r_1^2

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