\\\\(\ extbf{Step-1: Draw ray}\\\\) \\\\(\\mathbf{OP}\\\\) \\\\(\ ext{Take O as centre, draw an arc cutting}\\\\) \\\\(OP\\\\) \\\\(\ ext{at}\\\\) \\\\(Q.\\\\) \\\\(\ extbf{Step-2: Taking Q as centre and same radius, cut arc R, then from R, cut arc S.}\\\\) \\\\(\ extbf{Step-3: Taking centre R and S, draw point A, taking distance more than half of RS}\\\\) \\\\(\ extbf{ and then join OA.}\\\\) \\\\(\ extbf{Hence ,we have constructed right angled angle}\\\\) \\\\(\\mathbf{\\angle{POA}=90^0.}\\\\)