# Shared Flashcard Set

## Details

Geometry Final
Geometry final exam
32
Mathematics
05/23/2011

Term
 phi=
Definition
 1.618
Term
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 TOASOH CAH TOASOH CAH TOA
Term
 circumference of a circle
Definition
 c=2*pi*rc=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:btheir 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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