use the sun and silhoutte
It is easy to draw an equilateral triangle without a protractor. That gives a 60 degree angle. It is then simply a matter of bisecting the 60 degree angle, using an unmarked rule and compass, to get a 30 degree angle.
The best and most obvious way is to use a protractor. Other than that, there is no obvious and easy way.
One way is to use a protractor. There are others
I used a protractor to find the measure of the angle.
A protractor.
With a protractor
With a protractor
Use a protractor.
use a protractor
You can use a protractor.
with a protractor
Use a protractor