Circles and Center of Rotation in Geometry

Using a compass to create a closed curve with all points equidistant from a center point.

• Drawing a Circle

• Turning a Somersault

• Throwing a Ball

• Setting a Compass

A closed curve with all points equidistant from a fixed center point.

• Circles

• Triangles

• Squares

• Not Lines

A tool with two arms, one with a point and the other with a pencil, used for drawing circles and arcs.

• Ruler

• Protractor

• Compass

• Calculator

The study of shapes, sizes, and properties of figures.

• Geometry

• Polygon

• Calculus

• Algebra

It is a set of all points equidistant from a common point.

• circle

• radius

• diameter

• chord

• a

• b

• c

• d

In the equation
(x+2)²+(y+3)²=49, what is the center of the circle?

• (2, 3)

• (3, 2)

• (-3, -2)

• (-2, -3)

Find the diameter of the circle.

• 5 units 

• 4 units

• 12.2 units

• 7.5 units

Set of all points in the plane equidistant from a single point called the center

• circle

• chord

• polygon

• radius

The set of all points in a plane that are equidistance from a given point.

• Circle

• Polygon

• Concave

• Dodecagon