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Geometry Final
Geometry final exam
32
Mathematics
10th Grade
05/23/2011
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Term
phi=
 Definition
1.618
Term
quadratic formula
 Definition
x equals -b plus or minus the square root of b squared minus 4ac, all over 2a
Term
SOH CAH TOA
 Definition
SOH CAH TOA
SOH CAH TOA
SOH CAH TOA
Term
circumference of a circle
 Definition
c=2*pi*r
c=pi*d
Term
area of a circle
 Definition
A=pi*r^2
Term
Pythagorean triplets
 Definition
(3,4,5)
(5,12,13)
(7,24,25)
(8,15,17)
Term
isoceles right triangle
 Definition
(45,45,90)
(1,1,root 2)
Term
30-60-90 triangle
 Definition
(30,60,90)
(1, root 3, 2)
Term
slant height
 Definition
segment from the vertex opposite the base perpendicular to the side of the base
Term
altitude of a pyramid
 Definition
altitude from the vertex opposite the base perpendicular to the center of the base
Term
length of a diagonal of a cube
 Definition
d=root(a^2+b^2+c^2)
Term
sin30
 Definition
1/2
Term
cos30
 Definition
root(3)/2
Term
tan30
 Definition
root(3)/3
Term
sin45
 Definition
root(2)/2
Term
cos45
 Definition
root(2)/2
Term
tan45
 Definition
1
Term
sin60
 Definition
root(3)/2
Term
cos60
 Definition
1/2
Term
tan60
 Definition
root(3)
Term
area of a rectangle
 Definition
a=l*w
Term
area of a square
 Definition
a=s^2
Term
area of a triangle
 Definition
A=1/2*b*h
Term
area of a parallelogram
 Definition
a=bh
Term
area of a trapezoid
 Definition
A=1/2*(b1+b2)*h
Term
area of a regular polygon
 Definition
A=ap/2
Term
area of a rhombus
 Definition
A=(d1*d2)/2
Term
arc length
 Definition
=(x/360)2*pi*r
Term
sector area
 Definition
=(x/360)*pi*r^2
Term
length of a diagonal of a square
 Definition
=s*root(2)
Term
thm: if two similar figures have side ratio a:b, then
 Definition
their perimeters are a:b
their areas are a^2:b^2
Term
apothem
 Definition
distance from the center of the polygon to the midpoint of side
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