Answer:
set 4
Step-by-step explanation:
if u use the Pythagorean theorem for all these measurements, then you'll see:
set A:
(√2)²+(√7)²≠9²
2+7≠81
set B:
2² + (√5)²≠9²
4+5≠81
Set 3:
(√6)² + 2² ≠ 10²
6+4≠100
Set 4:
(√2)² + (√7)² = 3²
2+7=9
Hope this helps :)