What makes circle special and useful?

During our educational trip, I think of this question “What makes circle special and useful?” I always look at my surrounding. And there’s a circle everywhere. So, this time I know Cirlce is Special and important to all of us.

In our daily lives, we often use circle. For example, wall clock, the tires in our wheels, our eye ball etc. We do really need circle for our everyday lives, for me, our lives makes no sense if there’s no circle. What if, out head shapes square? Our eyes shapes triangle? What if it happens to us because circle is not yet discovered? I do believe in the concept especially the concept of Ferriswheel which is circle. What if the ferris wheel is square? How it will turn round and round and round?

How theorems in circle used?

February 19, 2014 we went to star city. And I always observing what is the theorems circle used. We’ll start in Ferris wheel. George Washington Gale Ferris, Jr.  used the concept of circle in Ferris wheel. He used the concept of circle so that the wheel should go around. ( World's Columbian Exposition)

How is circle used as art and as tools?  

The star Frisbee. You cannot make that ride if your concept is triangle, square of heart shape. You’ll use the concept of  circle so that it will turn around. 

You can make art in using circles only.