Symbol
$A_{\mathrm{i}}$
Unit
mm²
Formulae
$\frac{\pi}{4} \left(D_{\mathrm{i}}^{2} - d_{\mathrm{c}}^{2}\right)$
Related
$d_{\mathrm{c}}$
$D_{\mathrm{i}}$
Used in
$Q_{\mathrm{i}}$