Level 3

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9 Terms

1
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Circle formula:


(x-h)2 + (y-k)2. = r2 

2
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Circles: The radius can be broken into the horizontal distance

x-h (distance bwt x-coordinates)

3
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circles: Vertical distance :

y-k (distance from vertical points) 

4
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circles:  When finding arc length 

Ex: C = 12, find arc length of a section thats 60 degrees


  • 60/360 = 1/6 

  • ⅙ (12) is 2 = arc length 

  • Same with sector area, just replace C with A

5
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circles: inscribed angle

inside angle is ½ of the bigger one

6
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Convert between degrees and radians 


d = r * 180/pi 

r = d * pi/180

7
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Triangles: 

  • Congruent



  • = copies 

8
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triagnles: Similar =

scaled up or down

  • Can be proved by AA, SSS, SAS, but NOT SSA

9
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Box Plots


  • Show a data sets min, 25th percentile, 50th percentile (median) , 7th percentile, and max