CIRCLE

Circle

DEFINITION: A circle is a 2D shape that has NO STRAIGHT SIDES AND NO ANGLES. Unlike the other types of 2D shapes (quadrilateral or triangle), there is only ONE type of circle:

Circle

OPTIONAL: INTERESTING FACT

INTERESTING FACT:

A circle is a special kind of ellipse.

It is helpful to think of a CIRCLE as an ELLIPSE that has been INFLATED with one focus point.

Ellipse is a curve on a plane sur-
rounding two focal points such that a
straight line drawn from one of the
focal points to any point on the curve
and then back to the other focal point
has the same length for every point
on the curve. (Wikipedia)