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Pair Work on Circles
                                   Mathenlatics 4 Second Quarter
                                                                                                   ..
                                              August 8, 2010


       Vork on this problem set by pairs. Answers and complete solutions should be printed or
    written on Letter or A4 size white paper. Work with a different partner from the first, pair
    work.                                          .
       For numbers 1 to 7, find the equation of the circle(s) satisfying the given conditions: (3
    points each) .
       For numbers 8 to 10, solve each problem as specified. (4 points each)

      1. 	 Center at (3, -1) and passes through the point (-2,2).

      2. 	 Has a diameter whose endpoints are (-2,4) and (4,2).

      3. 	 Center at (5, -2), the midpoint of the segment joining the center and one of the points on
           the circle is (-2,1).

      4. 	 Passes through P(5, -4) with R( -        , -8) being the point ~ of the way from the center to
           P.
      5. 	 Passes through t.he points (-1,0), (0,2), and (2,0). (Use syst.ems of equations)

      6. 	 PaR"IeS through the points (-4,-3)' (-2,1), and (-:3,-6). (Use analytic geomet.ry)

      7. 	 Radius is 2 and passing through the points (1,2) and (:1,4).

      8. 	 The circle x 2 + y2 + 4x -- 6y
                                        k passes through the point (-1,-1). Find the value of k, the
         radius, and the center of the circle.

      9. 	 For what values of rand .9 will x 2 + y2 + 'rx + sy 25          0 be the equation of a circle
           having center at. (3A)? Fiud the radius of this cirde.

     10. Determine the value(s) of kso that the graph of

                                               2	              k 2 4k 110
                                            + y + 2:z:: - 4y = - - - 2 - 足
         is a circle, a point, or an empty set.

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Math 4 pair work on circles

  • 1. Pair Work on Circles Mathenlatics 4 Second Quarter .. August 8, 2010 Vork on this problem set by pairs. Answers and complete solutions should be printed or written on Letter or A4 size white paper. Work with a different partner from the first, pair work. . For numbers 1 to 7, find the equation of the circle(s) satisfying the given conditions: (3 points each) . For numbers 8 to 10, solve each problem as specified. (4 points each) 1. Center at (3, -1) and passes through the point (-2,2). 2. Has a diameter whose endpoints are (-2,4) and (4,2). 3. Center at (5, -2), the midpoint of the segment joining the center and one of the points on the circle is (-2,1). 4. Passes through P(5, -4) with R( - , -8) being the point ~ of the way from the center to P. 5. Passes through t.he points (-1,0), (0,2), and (2,0). (Use syst.ems of equations) 6. PaR"IeS through the points (-4,-3)' (-2,1), and (-:3,-6). (Use analytic geomet.ry) 7. Radius is 2 and passing through the points (1,2) and (:1,4). 8. The circle x 2 + y2 + 4x -- 6y k passes through the point (-1,-1). Find the value of k, the radius, and the center of the circle. 9. For what values of rand .9 will x 2 + y2 + 'rx + sy 25 0 be the equation of a circle having center at. (3A)? Fiud the radius of this cirde. 10. Determine the value(s) of kso that the graph of 2 k 2 4k 110 + y + 2:z:: - 4y = - - - 2 - 足 is a circle, a point, or an empty set.