Circles

Circles is eveywhere.. :)



In class we learn about geometry, and learn about circles.

Definition : A circle is the locus of all points equidistant from a central point.

radius : distance from center of circle to any point on it.

Arc : a curved line that is part of the circumference of a circle.

circumference: the distance around the circle.

diameter : the longest distance from one end of a circle to the other.

origin : the center of the circle.

pi () : A number, 3.141592..., equal to (the circumference) / (the diameter) of any circle.

sector : is like a slice of pie (a circle wedge).

tangent of circle: a line perpendicular to the radius that touches ONLY one point on the circle.