Answer:
24.4
Step-by-step explanation:
18 ÷ 2 = 9
26² = x² + 9²
x² + 81 = 676
x² = 676 - 81
x² = 595
x = √595
x ≈ 24.4
I hope I've helped you.
Answer: 24.4 I think not entirely sure but hope I helped
