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41 Cards in this Set

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  • Back
Angles of a right Triangle with one leg half the hypotenuse?
30 - 90 - 60
Reciprocal of a?
1/a
Product of any number and its reciprocal?
1
(b^m)(b^n)
b^m+n
(b^m)/(b^n)
b^m-n
(b^m)^n
b^mn
(b^m)(c^m)
(bc)^m
11^2
121
12^2
144
13^2
169
14^2
196
15^2
225
16^2
256
Cross Multiply
1/3 ? 3/8
Since 8 < 9
1/3 < 3/8
Cross Multiply
3/8 ? 45/120
8 * 45 = 3 * 120
so
3/8 = 45/120
20 / (2/3) = ?
20 * 3/2 = 30
To divide multiply by reciprocal
Deviation
difference from the average
(x - y)(x + y)
x^2 - y^2
(x - y)^2
(x^2) - 2xy + y^2
(x + y)^2
(x^2) + 2xy + y^2
Sides with the same length are opposite __________ angles
equal
a^2 + b^2 = c^2 if
triangle is a right triangle
a^2 + b^2 < c^2 if
if triangle is obtuse
a^2 + b^2 > c^2 if
if triangle is acute
Right Triangle for positive number x
3x, 4x, 5x
5, 12, ?
13 ... must know triangle
In 45 45 90 triangle sides = ?
x, x , x^1/2 = sqrt(x)
In 30 90 60 triangle
x = little
2x = hypotenuse
x*(sqrt3) = long
In non right triangle the sum of 2 sides is _________ than the other
always greater
In non right triangle the difference of 2 sides is _________ than the other
always less
Area of triangle?
1/2 * bh
Area of equilateral triangle?
((s^2)*sqrt3)/4
Sum of n angles in polygon of n sides?
(n - 2) * 180
Area of parallelogram?
A = bh
Area of square by diagonal
A = 0.5 d^2
Area of trapezoid?
A = 0.5 (base1 + base 2)height
Circumference?
2piR
Arc length of angle x?
(x/360)(2piR)
Area of sector fromed by arc with angle x?
(x/360)(piR^2)
Area of cube?
A = 6e^2
Slope =
(y2 - y1)/(x2 - x1)

rise over run