Symbol
$A_{\mathrm{prot}}$
Unit
mm²
Formulae
$\frac{\pi}{4} \left(1000000 D_{\mathrm{prot}}^{2} - \left(1000 D_{\mathrm{prot}} - 2 t_{\mathrm{prot}}\right)^{2}\right)$
Related
$D_{\mathrm{prot}}$
$t_{\mathrm{prot}}$