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Answer :

The first one is a triangle because: The two smaller sides of a triangle must add up to be larger than the longest side.
14 + 12 = 26 > 19

Answer:

14.4 inches

Step-by-step explanation:

Using the Pythagorean Theorem ([tex]a^2+b^2=c^2\\[/tex])

[tex]12^2+8^2=c^2\\144+64=c^2\\208=c^2\\c=\sqrt{208} = 14.4[/tex]

Hope this helps you out!

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