A triangle is classified based on its angles. The angles you provided measure 46°, 51°, and 83°.
- An acute triangle has all angles measuring less than 90°.
- A right triangle has one angle measuring exactly 90°.
- An obtuse triangle has one angle measuring more than 90°.
Since 46°, 51°, and 83° are all less than 90°, the triangle is an acute triangle.
So the response is: acute triangle.