Well since you already went through all that to find the length and angle, here's what you can do now...
- Choose the Line tool and holding Shift, draw a horizontal line of the prescribed length:
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- Choose Object > Path > Add Anchor Points:
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- Repeat Step 2:
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- With the line still selected, enter 331.5° in the Transform panel's angle field (your angle was from vertical, so since we started horizontal, I added another 90°):
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- With Snap to Point (and Smart Guides), turned on swap in your new line:
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