How can I form a 18 degree angle with just a ruler and compass

I know how to make a 45 degree angle by doing a random arch within 90 degree and then intersecting 2 archs..

but how can I get 18 degrees

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- Nov 27th 2009, 01:44 PMwolfhound18 degree angle
How can I form a 18 degree angle with just a ruler and compass

I know how to make a 45 degree angle by doing a random arch within 90 degree and then intersecting 2 archs..

but how can I get 18 degrees - Nov 27th 2009, 01:52 PMe^(i*pi)
- Nov 27th 2009, 02:00 PMwolfhound
- Nov 27th 2009, 02:13 PMskeeter
- Nov 27th 2009, 02:39 PMwolfhound