Measure Angles

Hello GH Community,

How might I go about measuring angles like in this screenshot where a line represents 0 degrees and the angle on one side is negative and the opposite is positive?

Thank you

angle measure.gh (10.9 KB)

angle measure_2024Aug15a
angle measure_2024Aug15a.gh (10.8 KB)

The expression on Degrees output is: if(x > 180,x-360,x)

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Thank you :pray: