theman4 theman4

14-07-2016
Mathematics

contestada

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

Can someone please answer There is one problem Theres a picture Thank you class=

Respuesta :

14-07-2016

Hello,

a²=b²+c²-2bc*cos(48°) (theorem of Al Kashi)
==>a²=5²+8²-2*5*8*cos(48°)=35,469551...
==>a=5,9556...≈6

Answer A

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