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Easiest is to use a protractor.

Alternative: Draw a 90 degree angle.

Bisect the external angle so that it is 45 degrees.

Trisect that angle so that the angle adjacent to the 90 degree angle is 15 deg

Then 90 + 15 degrees = 105 degrees.

Both, bisection and trisection require the use of a compass (and ruler).

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14y ago

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Q: How do you draw 105 degree angle?
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