2D Area & Perimeter

A quick way to remember Perimeter is Sum of all sides:
For a 4 sided shapes:
For Square, Rectangle, Parallelogram, etc...
Perimeter= s+s+s+s
s=side

Area will be a little harder:
For Square, Rectangle, and Parallelogram
Area = b×h
b = base
h = height

Triangle
Area = ½b×h
b = base
h = height

Here is a good site to learn and have fun with 2D math:
http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks2/maths/perim...