Answer:
8cm
Step-by-step explanation:
The length of the other leg can be determined using the Pythagoras theorem
The Pythagoras theorem : a² + b² = c²
where a = length
b = base
c = hypotenuse
17² = 15² + b²
289 = 225 + b²
b² = 289 - 225
b² = 64
b = √64
b = 8cm