kiahtab13 kiahtab13
  • 14-04-2018
  • Mathematics
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I think know this but im not sure?....

I think know this but im not sure class=

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sophyyyy
sophyyyy sophyyyy
  • 14-04-2018
It is Law of cosine:)
a^2=11^2+13^2-2(11)(13)cos108°
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