Geometry Flashcards
1
Q
P=2a +2b
Or
P=2(a+b)
A
Perimeter of a parallelogram
2
Q
A=1/2 bh
A
Area of a triangle
3
Q
A=Bh
A
Parallelograms area
4
Q
A=1/2(B1 + B2)
A
Area of a trapezoid
5
Q
A= 1/2(d1) (d2)
A
Area of a kite
6
Q
F O I L
A
First, out, inner, last
7
Q
45-45-90° triangle theorem
A
Hypotenuse = leg • \/2
8
Q
30-60-90° triangle theorem
A
Hypotenuse= short leg • 2
Long leg= short leg • \/3
Short= X
9
Q
A= 1/2 ap
Apothem x diameter
A
Area of a regular polygon
10
Q
Circumference
A
C=pi•d
Or
2pi•r
11
Q
Arc length measure
A
L= m AB
——— • 2pi • r
360°
12
Q
Euler’s formula
A
Vertices + faces - edges = 2
13
Q
Area of a circle
A
Pi•r2(squared)
14
Q
Surface area of a prism
And lateral area
A
LA= perimeter of base • height
SA= LA +2B
B=area of base
15
Q
LA of a cylinder
A
2pi •r•h
Or
Pi•d•h
