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Basic Formulas to Know

Pyramid info:

pyramid
volume= ( 1 / 3 )hLw

 

Cone info:

cone with radius r
volume= ( 1 / 3 ) * pi * r^2 * h

 

Trapezoid info (isosceles):

isosceles trapezoid
area= ( 1 / 2 )h( B + b )

 

Troughs (water drains out of these a lot!):

* Volumes work just like prisms...  Take the area of the end and
  multiply by the length!
 

trough ( or prism )