First we need to find the missing side, use
[tex]a = \sqrt{ {c}^{2} - {b}^{2} } [/tex]
So the missing leg = the sqrt of the hypotenuse squared minus the other leg squared.
Let's substitute the numbers,
[tex]a = \sqrt{ {10}^{2} - {6}^{2} } [/tex]
Solve for the squares,
[tex]a = \sqrt{100 - 36} [/tex]
Subtract,
[tex]a = \sqrt{64} [/tex]
Solve for the root,
[tex]a = 8[/tex]
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So our missing length is 8.
To find the perimeter of the triangle, simply add all the sides....
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[tex]8 + 10 + 6 = 24[/tex]
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Answer : 24
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I hope that helps you out!!
Any more questions, please feel free to ask me and I will gladly help you out!!
~Zoey