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15 Cards in this Set
- Front
- Back
a2-b2
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(a-b)(a+b)
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a2+2ab+b2
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(a+b)2
a2-2ab+b2 = (a-b)2 |
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ax2+bx+c
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= 0
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Finding the distance b/n two points
D = |
square (x1-x2)2 + (y1-y2)2
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Using two point to find the slope:
Slope = |
Change in y
--------- = Rise/Run Change in x |
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Finding the Midpoint
if the endpoints are (x1, y1) and (x2, y2), the midpoint is |
(x1+x2) (y1+y2)
------ ------- 2 2 |
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-n
X = |
1
--- n X |
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Using an Equation to Find the Slop (slope intercept)
Y = |
Mx+b
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Length of an Arc
if n is the degree measure of the arc's central angle then Length of Arc = |
(n/360)(2PIr)
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Area of Circle =
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PIR2
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if n is the degree measure of the sector's central agnle, then the
Area of a Sector |
(n/360)(PIr2)
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In a 45-45-90 right triangle the sides =
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x, x and x square 2
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In a 30-60-90 righttriangle, the sides =
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x, x sq 3, 2x
square 3 |
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Area of an Equilateral triangle with side s, A =
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S2 sq 3
------ 4 S square * square of 3 divided by 4 |
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Acute angel
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X<90 degrees
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