Answer:
[tex]\angle A=90-72[/tex]
[tex]\angle A=18[/tex]
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[tex]sin~72=\frac{b}{11}[/tex]
[tex]11\times sin~72=6[/tex]
[tex]b=10.5[/tex]
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[tex]11\times cos~72=a[/tex]
[tex]a=3.4[/tex]
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ANSWER:
a=3.4
b=10.5
∠A=18
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hope it helps...
have a great day!!
