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CSI by the Numb3rs

CSI by the Numb3rs. MathScience Innovation Center. Finding the Center of Circle. Draw two chords on the circle Find the perpendicular bisectors for each Where the two perpendicular bisectors meet is the center of the circle. Perpendicular bisector. Perpendicular bisector. center.

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CSI by the Numb3rs

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  1. CSI by the Numb3rs MathScience Innovation Center

  2. Finding the Center of Circle • Draw two chords on the circle • Find the perpendicular bisectors for each • Where the two perpendicular bisectors meet is the center of the circle Perpendicularbisector Perpendicularbisector center chord chord

  3. Follow Sketchpad directions to determine diameter of plate

  4. Finding the Angle of Elevation 500 feet 1425 feet

  5. Tangent Ratio Opposite = Tangent Adjacent 500 feet 1425 feet

  6. Solving for X = 500 x tan 1425 ( ( 500 x = -1 tan 1425 500 feet x 1425 feet

  7. Solving for X = 500 x tan 1425 ( ( 500 x = -1 tan 1425 x ≈ 19.33⁰ 500 feet x 1425 feet

  8. Use trig, shadow, and website to help determine the time of day

  9. Suspect Worksheets

  10. Your job: • Sort through the evidence • Listen to ipod and/or read interviews • Find the criminal

  11. Debriefing: Share your ideas with your supporting evidence.

  12. Time to clean up . . . • Please put all papers and • documents back in proper spot • Return ipods • Move chairs/desks back to • original position

  13. The End

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