Answer:
5 , 7 , 8
Step-by-step explanation:
If the sum of squares of the smallest sides is greater than the largest side, then the triangle is acute triangle.
Sum of squares of smallest sides = 5² + 7²
= 25 + 49
= 74
Square of the largest side = 8²
= 64
74 > 64
[tex]\sf \boxed{\bf \text{Sum of squares of smallest side} \ > \bf \text{square of largest side.}}[/tex]
So, 5,7,8 form an acute triangle.