Equations of Circles

Which of the following is the definition of a circle?

Check all that apply

The straight distance from one edge of a circle to another edge through the center
The middle point of a circle
The set of all points equidistant from a center point
The distance from the center of a circle straight to any edge

Which of the following is the definition of a radius?

Check all that apply

The straight distance from one edge of a circle to another edge through the center
The middle point of a circle
The set of all points equidistant from a center point
The distance from the center of a circle straight to any edge

Which of the following is the definition of a center of circle?

Check all that apply

The straight distance from one edge of a circle to another edge through the center
The middle point of a circle
The set of all points equidistant from a center point
The distance from the center of a circle straight to any edge

Which of the following is the definition of a diameter?

Check all that apply

The straight distance from one edge of a circle to another edge through the center
The middle point of a circle
The set of all points equidistant from a center point
The distance from the center of a circle straight to any edge

Use this equation to answer the following questions.

Center: (3,4) Radius: 5

Center: (7,-2) Radius: 9

Center: (1,1) Radius: 1

Center: (0,0) Radius: 10

What is the equation of the circle graphed above?