I'm not an expert, but it makes more sense to be circles because it's easier to get around, and roll. Cars would have a tough time getting around if tires were rectangle shaped.
One can find discounted Michelin tires online at websites such as Discount Tires or Black Circles. One can also go to Canadian Tire, Walmart or Sears to find these tires for lower prices.
One can purchase Goodyear Wrangler HP tires from: My Tires, Oponeo, Love Tyres, Tyre Shopper, Black Circles, Good Year, Amazon, Tire Rack, Sears, Tread Depot, Tire Buyer.
circles are used to set bases of cylinders, diameters for barrels, tires, ect... if you CAN'T think of anything else a circle is used for, think HARDER and there is no real use for trapezoids accept in architecture and other design methods. :)
If you share with your circles, only your circles can see what you've posted. Extended circles includes people who are in your circles' circles. (Hope that makes sense!)
fungo circles
This specific size of tyres can be purchased at a variety of online stores. Examples of such stores are ASDA Tyres, Kwik-Fit, Michelin, and Black Circles.
Circles with the same radius are congruent circles.
A pair of compasses are use to construct circles and arcs of circles
Concentric circles are a series of circles within each other.
No, circles do not have angles.
That circles have no sides
Concentric circles are circles with the same common centre.