Formulary : Maths - Geometry

Square □

A square is a basic shape which has four equal sides and four equal right angles (90°).

The perimeter U is the length of all 4 sides.

${\color{blue} {U}} = 4 \times {\color{red} {a} }$

U = Perimeter

a = Edge Length

${\color{blue} {U}} =2 \times \sqrt{2} \times {\color{red} {d} }$

U = Perimeter

d = Diagonal

The region inside a square.

${\color{OliveGreen} {A}} = {\color{red} {a} } \times {\color{red} {a} } = {\color{red} {a} }^{2}$

A = Area

a = Edge Length

${\color{OliveGreen} {A}} = \frac{ {\color{red} {d} }^{2} }{2}$

A = Area

d = Diagonal

$d=sqrt(2*a^2)$

d = Diagonal

a = Edge Length

$a=sqrt( d^2/2 )$

a = Edge Length

d = Diagonal