## Circles

 6.2 Circles

 Definition of a Circle A circle is a closed two-dimensional figure in which the set of all points in the plane are equidistant from a certain point called the 'center'. Each line passing through the circle forms a line of symmetry of reflection. Also, the circle has rotational symmetry around the center for each angle.

_____ = Radius

_____ = Diameter

 WORDS EXPLANATION Center of circle The point located in the center of the circle. Circumference of a circle A closed curve that is the boundary of a circular shape. Diameter A straight line that connects two points on the circumference and passes through the center of the circle. Radius A straight line that connects the center of a circle with the circumference of the circle.

## Circles

 6.2 Circles

 Definition of a Circle A circle is a closed two-dimensional figure in which the set of all points in the plane are equidistant from a certain point called the 'center'. Each line passing through the circle forms a line of symmetry of reflection. Also, the circle has rotational symmetry around the center for each angle.

_____ = Radius

_____ = Diameter

 WORDS EXPLANATION Center of circle The point located in the center of the circle. Circumference of a circle A closed curve that is the boundary of a circular shape. Diameter A straight line that connects two points on the circumference and passes through the center of the circle. Radius A straight line that connects the center of a circle with the circumference of the circle.