A system of expressing an angle in mathematical form is called the representation of an angle.
An angle is represented mathematically in a special format.
$\overrightarrow{PQ}$ and $\overrightarrow{PR}$ are two lines and they formed an angle at their vertex $P$.
A special symbol ($\angle$) is used to represent an angle.
Angle is formed at point $P$ by the lines $\overrightarrow{PQ}$ and $\overrightarrow{PR}$. So, the end points of the arms of angle $\overrightarrow{PQ}$ and $\overrightarrow{PR}$ are written both sides of the vertex, followed by the angle symbol.
The angle is represented by either $\angle QPR$ and read as $angle \, QPR$. Similarly, it is also represented as $\angle RPQ$, read as $angle \, RPQ$.
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