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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^mn

(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 