Welcome to the wonderful world of geometry.  Geometry takes the basic understanding of algebra and applies it to shapes and angles.  Geometry also includes a study of right triangle trig that is developed through similarity relationships.


Basic area formulas:

Rectangle = bh

Triangle = 1/2bh

Circle = ∏(radius squared)


Perimeter formula:

 Add all side lengths of the polygon


Circle - 2 ∏ (radius)