Answer:
No
Explanation:
If they are a Pythagorean triple, then the square of the largest number will equal the sum of the squares of the other 2 numbers.
largest number = 9 and 9² = 81
6² + 8² = 36 + 64 = 100 ≠ 81
Thus 6, 8 and 9 are not a Pythagorean triple