Answer:
if you use the hypotenuse formula
[tex]c = \sqrt{a ^{2} + {b}^{2} }[/tex]
a = 12
b = 16
now input the values and solve for c
[tex]c = \sqrt{ {12}^{2} + {16}^{2} } [/tex]
[tex]c = \sqrt{144 + 256} [/tex]
[tex]c = \sqrt{400} [/tex]
Square root of 400 = 20
so the long side is 20
