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
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
$\displaystyle 18 = \frac{360}{20} $ so draw 1/20 of a circle or 1/10 of a semicircle
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
I believe you need to construct a regular pentagon (directions can be found using a google search).
drawing in the diagonals of the pentagon forms the familiar 5-pointed star, each point is 36 degrees ... bisect that angle.