The measures of three angles of a triangle are in the ratio of 3 : 2 : 1. The triangle is a/an:

right angled triangle

The measures of three angles of a triangle are in the ratio of =  3 : 2 : 1

Let the angles of the triangle = 3x, 2x and x

So according to the rule of triangle,

3x + 2x + x = 180

6x = 180

x = 30

So the angles are = 90, 60 and 30

As one angle is 90^o then the triangle is a right angled triangle.