\(V = \left| {\left[ {\overrightarrow {AB} ,\overrightarrow {AD} } \right].\overrightarrow {AA'} } \right|\)

\(V = \left| {\left[ {\overrightarrow {AB} ,\overrightarrow {AD} } \right]} \right|.\overrightarrow {AA'} \)

\(V = \left| {\left[ {\overrightarrow {AB} ,\overrightarrow {AA'} } \right].\overrightarrow {AD} } \right|\)

\(V = \left| {\left[ {\overrightarrow {AA'} ,\overrightarrow {AD} } \right].\overrightarrow {AB} } \right|\)