Perimeter 
Polygon 
P = sum of the lengths of all sides 
Rectangle 
P = 2(l + w) 
Circumference 
Circle 
C = 2r, or C = d 
Area 
Rectangle 
A = lw 
Square 
A = s^{2} 
Parallelogram 
A = bh 
Triangle 
A = (1/2)bh 
Trapezoid 
A = (1/2)h(b_{1} + b_{2}) 
Circle 
A = r^{2} 
Surface Area 
Cone 
S = r^{2} + rs 
Cylinder 
S = 2(r^{2}) + (2rh) 
Volume 
Cone 
V = (1/3)Bh, or V = (1/3)r^{2}h 
Cube 
V = e^{3} 
Cylinder 
V = Bh, or V = r^{2}h 
Prism 
V = Bh 
Pyramid 
V = Bh 
Sphere 
V = (4/3)r^{3} 
Misc. 
Diameter 
d = 2r 
Pythagorean Theorem 
c^{2} = a^{2} + b^{2} 
Consumer 
Distance traveled 
d = rt 
Simple Interest 
I = prt 
Compound Interest 
A = p(1 + r)^{n} 
