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2006 7 3
 

2006 7 3

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    2006 7 3 2006 7 3 Presentation Transcript

    • CIRCLES Topic 7.3
    • Definitions
      • Circle: The set of all points that are the same distance from the center
      • Radius: a segment whose endpoints are the center and a point on the circle
    • Equation of a Circle
    • Writing the Equation of a Circle
      • Group x terms together, y-terms together, and move constants to the other side
      • Complete the square for the x-terms
        • Remember that whatever you do to one side, you must also do to the other
      • Complete the square for the y-terms
        • Remember that whatever you do to one side, you must also do to the other
    • Example: Write the equation and find the center and radius length of : Group terms Complete the square
    • You try!!: Write the equation and find the center and radius length of :
    • THINK ABOUT IT Find the center, the length of the radius, and write the equation of the circle if the endpoints of a diameter are (-8,2) and (2,0). Center : Use midpoint formula! Length : use distance formula with radius and an endpoint Equation : Put it all together