Circles

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.