411 REFERENCE · Wikibooks
Geometry Course/Polygon/Quadrilateral/Rectangle
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Rectangle
Rectangle is a Quadrilaterl that has two long sides parallel and congruent to each other and two short sides parallel and congruent to each other and the four equal angles equal to 90o
200px
AD // = BC
AB // = DC
Properties
Perimeter
P = AD + BC + AB + DC = 2x(a+b)
Area
Volume