Answer:
60
Step-by-step explanation:
[tex]45^{2} +b^{2} =75^{2} \\2025+b^{2}=5625\\b^{2} =3600\\b=60[/tex]
60 m
use Pythagorean Theorem:
a = missing side
a² + 45² = 75²
a² + 2025 = 5625
a² = 3600
a = [tex]\sqrt{3600}[/tex]
a = 60
