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theman4 theman4
  • 14-07-2016
  • Mathematics
Answered

Can someone please answer. There is one problem. There's a picture. Thank you!

Can someone please answer. There is one problem. There s a picture. Thank you! class=

Verified Answer :

caylus
caylus caylus
  • 14-07-2016

Hello,

a²=b²+c²-2bccos(48°) (theorem of Al Kashi)
==>a²=5²+8²-258cos(48°)=35,469551...
==>a=5,9556...≈6

Answer A

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