Perimeter of a square.
P=4l
Perimeter of a triangle.
P=a+b+c
Perimeter of a parallelogram.
P=2a+2b
Perimeter of a circle.
P=2pir
Perimeter of a trapezoid.
P=a+b+c+d
Pythagorean Theorem.
a^2+b^2=c^2
c=sqrt(a^2+b^2)
Area of a square.
A=l^2
Area of a triangle.
A=1/2 bh
Area of a parallelogram.
A=bh
Area of a circle.
A=pir^2
Area of a trapezoid.
A=h((a+b)/2)
Area of a circular ring (washer).
A=pi(R^2-r^2)
Surface area of a cube.
A=6l^2
What is the surface area of a right circular cone and how is the value of s determined?
A=pir^2+pirs
s=sqrt(r^2+h^2)

Surface area of a rectangular box.
SA=2ab+2ac+2bc
Surface area of a sphere.
SA=4pir^2
Surface area of a cylinder.
SA=2pir(r+h)
Length of a circular sector.
L=pir(theta/(180°))
Volume of a cube.
V=l^3
What is the volume of a right circular cone?
V=1/3pir^2h
Volume of a rectangular box.
V=abc
Volume of a sphere.
V=(4pir^3)/3
Volume of a cylinder.
V=pir^2h
Area of a circular sector.
A=pir^2(theta/(360°))