Problem:

Given two circles, show constructions for all of the common tangent lines.

A "common tangent line" for two circles would be a line that is simultaneously tangent to the two given circles.

There are four such common tangents:

Prepare a GSP file with script tools to implement the construction.

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HEREfor mine.

The GSP file script tools shows the end result. Can you use GSP to illustrated the steps leading to the construction?

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