AND overlap at one.......imp.....b/c the unit circle....has a radius of 1....a circle has one side.....two ones..............like 2 - 11................and interconnection..........two fractions...made from using 1 twice..............using 1 twice.....like 1/2...........

Circles, squares and triangles.......a square and a circle have 360 degrees.....a triangle has 180 degrees........180/360 = 1/2.......just like the c line..................

4

15.....it is a right triangle...........14 straight up.....like 14i.....if i use your noggin..........yo' imagination..............and another 1/4th and 1/5th..............and 45....along the hyp......