Question

answer
isosceles acute
scalene acute
isosceles right
isosceles obtuse
equilateral
scalene right
scalene obtuse

Explanation:

Step1: Check side - lengths

The side - lengths of the triangle are 2.91, 5.81, and 6.5. Since all three side - lengths are different, it is a scalene triangle.

Step2: Check angles

One of the angles is 90°. A triangle with a 90° angle is a right - triangle.

Answer:

Scalene Right