$|\overrightarrow{\mathbf{A}}+\overrightarrow{\mathbf{B}}|=|\overrightarrow{\mathbf{A}}-\overrightarrow{\mathbf{B}}|$ হলে ভেক্টর $\vec{A} ও \vec{B}$ এর ক্ষেত্রে

$\overrightarrow{\mathrm{A}} \times \overrightarrow{\mathrm{B}}=0$

$\overrightarrow{\mathrm{A}} \cdot \overrightarrow{\mathrm{B}}=0$

$\overrightarrow{\mathrm{A}}=\overrightarrow{\mathrm{B}}$

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