Geometrical Properties of Square

Side length

a =   m

Area

A = a² m²

Centroid

z_c = y_c = a2 m

Perimeter

P = 4·a m

Second moments of area

I_z = I_y = a⁴12 m⁴

Polar moment of area

I_x = 2·I_y m⁴

Radii of gyration

r_z = r_y =  I_yA m

r_x =  I_xA m