Perimeter

P = 2 ⋅ ( p + l ) {\displaystyle P=2\cdot (p+l)}

P : perimeterp : panjangl : lebar

9+9+4+4

Keluasan

L = p ⋅ l {\displaystyle L=p\cdot l}

Panjang pepenjuru

d = p 2 + l 2 {\displaystyle d={\sqrt {p^{2}+l^{2}}}}