anonymous
  • anonymous
In ∆ABC, if a = 8.75 centimeters, c = 4.26 centimeters, and m B = 87°, what is the length of b to two decimal places?
Geometry
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
A)8.92 CM B)9.41CM C)9.53CM D)13.01 E)15.36
Itsyacoolgrl
  • Itsyacoolgrl
you will need the law of cosines to solve it b2=a2+c2−2a×c×cos(B) just substitute your values
Itsyacoolgrl
  • Itsyacoolgrl
Solution: cosB= (a^2+c^2-b^2)/2ac b = sqrt(a^2+c^2-2ac*cosB) = sqrt(8.75^2+4.26^2-2*8.75*4.26*cos87) =9.53 So b=9.53cm

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anonymous
  • anonymous
my teacher hasn't taught us that yet and shes giving us stuff to do can you walk me through
Itsyacoolgrl
  • Itsyacoolgrl
Really? how does she expect you to solve it if you don't know "sohcahtoa" What grade are you in?
anonymous
  • anonymous
I don't know , ima a sophomore
Itsyacoolgrl
  • Itsyacoolgrl
Hmmm, sorry i'm a freshman. Is this for geometry?
anonymous
  • anonymous
yes
Itsyacoolgrl
  • Itsyacoolgrl
That's weird :/ I learned sohcahtoa in my freshman year, (I'm going to be a sophomore in the upcoming year). I don't know how to help you but goodluck!

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