We will have the following:
First, we have that:
[tex]m<\text{VSW}+m<\text{WSR}=90[/tex]And we have that:
m[tex]m<\text{VSW}+4m<\text{VSW}=90\Rightarrow5m<\text{VSW}=90[/tex][tex]\Rightarrow m<\text{VSW}=18[/tex]So, the measurement of angle VSW is 18°.
