15. Five marks exercise problems X

In \(\Delta RST\), \(\angle S\) is \(10^\circ\) greater than \(\angle R\) and \(\angle T\) is \(5^\circ\) less than \(\angle S\), find the three angles of the triangle.

 

\(\angle R\) \(=\) \(^\circ\)

 

\(\angle S\) \(=\) \(^\circ\)

 

\(\angle T\) \(=\) \(^\circ\)