Rectangle
Rectangle Formulas
(See representation above)
a : length
b : width
d : diagonal
P : perimeter
A : area
Rectangle diagonal formula
| Diagonal given length (a) and width (b) : `d = sqrt(a^2+b^2)` |
Other formulas :
given area (A) and length (a) : `d = sqrt(a^2 + A/a)`
given area (A) and width (b) : `d = sqrt(b^2 + A/b)`
given perimeter (P) and length (a) : `d = sqrt(a^2 + (P / 2 - a)^2)`
given perimeter (P) and width (b) : `d = sqrt(b^2 + (P / 2 - b)^2)`
Rectangle perimeter formulas
| Perimeter given length (a) and width (b) : `P = 2*(a+b)` |
Other formulas :
given length (a) : `P = 2*(a+A/a)`
given width (b) : `P = 2*(b+A/b)`
Rectangle area formula
| Area given length (a) and width (b) : `A = a*b` |
Other formulas :
given length (a) and perimeter (P) : `A = a*(P / 2 - a)`
given width (b) and perimeter (P) : `A = b*(P / 2 - b)`
See also
Plane Geometry calculators
Geometry Calculators
Mathematics Calculators