Sif: Verskil tussen weergawes

: <math>\alpha = fraksie\ oop\ area = \frac{oop\ area}{totale\ area}</math>

 

 

: <math>k = \left ( 0.707 \left ( 1-\alpha \right )^{0.375} + 1 - \alpha \right )^2 \frac{1}{\alpha^2}</math>

 

 

: <math>k = 1.3 \left (1-\alpha \right ) + \left (\frac{1}{\alpha}-1 \right )^2</math>