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GRE MATHHHHHHH
formulas to know...
15
Mathematics
10th Grade
12/10/2007

Additional Mathematics Flashcards

 


 

Cards

Term
percent increase
Definition
(amount of increase/original whole)*100
Term
#of interers from A-->B
Definition
B-A+1
Term
Sum of Consecutive Integers
Definition
=(Average)*(# of terms)
Term
Simple Interest
Definition
(principal)*(interest rate (as a decimal))*(time in years)
Term
Work Problem
Definition

1/r +1/s = 1/t

 

t=hours working together 

r= number of hours it takes r to complete the job

s=number of hours it takes s to complete the job 

Term
Group Problem (Neither/Both)
Definition
group 1 + group 2 + neither - both = total
Term
Maximum and Minimum Lengths for Sides of a Triangle
Definition

3rd side= greater than the positive difference of the two legs and less than the sum

 

 

Term
Sum of Angles for a Regular Polygon
Definition

Sum of the interior angles with n sides

 

 n sides= (n-2)* 180

 

Degree of one angle= ((n-2)*180)/n 

 

ex: n=5 (pentagon)

 

((5-2)*180)/5

Term
Length of an Arc
Definition

(n/360) * 2(pi)r

 

n=angle 

 

 

Term
Area of a Sector
Definition
(n/360)*((pi)(r^2)
Term
Volume of a Rectangle
Definition
l*w*h
Term
Volume of a Cylinder
Definition
(pi)(r^2)(h)
Term
Volume of a Cylinder
Definition
4/3(pi)(r^3)
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