Different shapes and Origami

(The World of 2-dimension)

(2) Divide the angle into two

(a) Divide right angle (90°) into 2 to the power of n.

You can fold the angle into two or four easily
(Just you fold in half again and again).


(b) Divide right angle into 3 equal parts

You can apply the method of folding equilateral triangle

　　　　

(c) Divide right angle into 5 equal parts

When you divide 90°into 5 , you get 18°
90°÷　5　＝　18°
One corner of the pentagon is 36°×　3
18°is the half of 36°

You fold the pentagon first then fold one of the corners into two.

polygonarea