Let the angles of the triangle be $$ heta,2 heta$$ and $$3 heta$$ Sum of angles of the triangle = $$ heta+2 heta+3 heta=180^circ$$ => $$6 heta=180^circ$$ => $$ heta=frac{180^circ}{6}=30^circ$$ $$ herefore$$ Angles of the triangle = $$30^circ,$$ $$60^circ$$ and $$90^circ$$  Thus, it is a right angled triangle. => Ans - (C)