Answer:
8.6
Explanation:
From the above question, we know that the length of the third side is the longest. Hence, we apply Pythagoras Theorem
c² = a² + b²
a = 5, b = 7
c = Third side
c = √a² + b²
c = √5² + 7²
c = √25 + 49
c = √74
c = 8.602325267
Approximately c = 8.6
Possible length of the third side = 8.6