### Exercise condition:

2♦

Calculate the value of \(SR\) of an equilateral triangle \(PQR\) if its each sides measures 492 \(mm\) and \(PS\) is the altitude of \(PQR\).

The length of \(SR\) is \(mm\).

2♦

Calculate the value of \(SR\) of an equilateral triangle \(PQR\) if its each sides measures 492 \(mm\) and \(PS\) is the altitude of \(PQR\).

The length of \(SR\) is \(mm\).