Step-by-step explanation:


and,

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☆Find the 

Here,
BC =AC
so,
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we know that,

But
(Ģìvéñ)
so..







But...

soo,


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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:
28 hours
Step-by-step explanation:
6x28=168