Answer:
C. 15
Step-by-step explanation:
[tex]a^2 + b^2 = c^2[/tex] a= 9 b = 12. which would = 225
[tex]\sqrt{225}[/tex] = 15
c. 15
A right triangle can use the pythagorean theorem. Using this theorem you should get
[tex]12^2 + 9^2 = c^2\\c=\sqrt{144+81} \\c=15[/tex]
