What is the definition of a circle

The video tutorial introduces the concept of a circle, comparing it to a parabola. It explains that a parabola is a set of points equidistant from a focus and a directrix. The focus then shifts to circles, defining them as a set of points equidistant from a center point. The tutorial emphasizes understanding the definition and properties of circles, encouraging students to write down the definitions for better comprehension.

What is the definition of a parabola?

• A set of points equidistant from a focus and a directrix

• A set of points equidistant from a center

• A set of points equidistant from a vertex

• A set of points forming a straight line

What is the central point of a circle called?

• Directrix

• Focus

• Center

• Vertex

How is a circle defined in terms of its points?

• A set of points equidistant from a line

• A set of points forming a triangle

• A set of points equidistant from a central point

• A set of points forming a square

What does 'equidistant' mean in the context of a circle?

• Equal distance from a focus

• Equal distance from a vertex

• Equal distance from a point

• Equal distance from a line

Which of the following is true about all points on a circle?

• They are equidistant from a focus

• They are equidistant from a directrix

• They are equidistant from a vertex

• They are equidistant from the center