Exploring the Components of a Circle

What is the definition of a circle?

• A closed curve consisting of points at a fixed distance from a point outside the curve

• A polygon with infinite sides

• The set of all points equidistant from a center point in a plane

• A shape with equal sides

What do you call a line segment passing through the center of a circle and touching two points on the circle?

• Chord

• Arc

• Radius

• Diameter

Which circles have the same radius?

• Concentric

• Adjacent

• Congruent

• Similar

What defines concentric circles?

• Circles with different centers

• Circles with the same radius

• Circles sharing the same center

• Circles that do not overlap

Can a set of circles be both concentric and congruent?

• No, unless they are on different planes

• Yes, if they have different radii

• Yes, if they share the same center and radius

• No, it is geometrically impossible

What should you keep in mind when answering questions about circles?

• Whether the circles are true or false

• The thickness of the circle's line

• The properties of congruency and concentricity

• The color of the circles