Answer:
41
Step-by-step explanation:
40^2+9^2=1681
the square root of 1681 is 41
[tex]c^{2}[/tex] = 41
[tex]9^{2}[/tex] + [tex]40^{2}[/tex] = [tex]c^{2}[/tex]
81 + 1600 = [tex]c^{2}[/tex]
1681 = [tex]c^{2}[/tex]
[tex]\sqrt{1681}[/tex] = 41
