schoolstuffE schoolstuffE
  • 25-02-2018
  • Mathematics
contestada

Determine the number of possible triangles, ABC that can be formed given angle A=30 degrees, a=4 and b=6

Respuesta :

peterbarnettb peterbarnettb
  • 28-02-2018
B=60 and C=90. I hope this helps
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AlonsoDehner AlonsoDehner
  • 04-07-2019

Answer:

One possible triangle

Step-by-step explanation:

Given that in a triangleABC given one angle A =30 , two sides a and b

We can use sine angle formula for triangles

[tex]\frac{a}{sinA} =\frac{b}{sinB} =\frac{c}{sinC}[/tex]

Substitute to get

[tex]\frac{4}{sin30} =\frac{6}{sin B} =\frac{c}{sinC}[/tex]

[tex]sin B = 0.75\\B=48.6[/tex]

C=[tex]180-30-48.6\\= 101.4[/tex]

[tex]c=8sin 101.4\\c=7.842[/tex]

There can be only one triangle

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