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Circle formula:
(x-h)2 + (y-k)2. = r2
Circles: The radius can be broken into the horizontal distance
x-h (distance bwt x-coordinates)
circles: Vertical distance :
y-k (distance from vertical points)
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
circles: inscribed angle
inside angle is ½ of the bigger one
Convert between degrees and radians
d = r * 180/pi
r = d * pi/180
Triangles:
Congruent
= copies
triagnles: Similar =
scaled up or down
Can be proved by AA, SSS, SAS, but NOT SSA
Box Plots
Show a data sets min, 25th percentile, 50th percentile (median) , 7th percentile, and max