מרובע סאקרי – הבדלי גרסאות

<math>\cosh s = (\cosh b -1) \cosh^2 l + 1 = \cosh b \cdot \cosh^2 l - \sinh^2 l</math><ref>{{הערה|P. Buser and H. Karcher. Gromov's almost flat manifolds. Asterisque 81 (1981), page 104.</ref>}}

:<math>\sinh \left( \frac{s}{2} \right) = \cosh\left( l \right) \sinh\left( \frac{b}{2} \right) </math><ref>{{הערה|{{cite book|authorlink=Marvin Greenberg|last1=Greenberg|first1=Marvin Jay|title=Euclidean and non-Euclidean geometries : development and history|date=2003|publisher=Freeman|location=New York|isbn=9780716724469|page=411|edition=3rd }}</ref>}}