kita menggunakan aturan sinus
[tex]\frac{a}{sin A} = \frac{c}{sin C}[/tex]
[tex]\frac{20}{sin 30} = \frac{c}{sin 45}[/tex]
[tex]\frac{20}{ \frac{1}{2} } = \frac{c}{ \frac{\sqrt{2}}{2} }[/tex]
c = [tex]\frac{20 . \frac{\sqrt{2}}{2} }{1/2}[/tex] = [tex]\frac{10\sqrt{2} }{\frac{1}{2} }[/tex] = 20√2
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kita menggunakan aturan sinus
[tex]\frac{a}{sin A} = \frac{c}{sin C}[/tex]
[tex]\frac{20}{sin 30} = \frac{c}{sin 45}[/tex]
[tex]\frac{20}{ \frac{1}{2} } = \frac{c}{ \frac{\sqrt{2}}{2} }[/tex]
c = [tex]\frac{20 . \frac{\sqrt{2}}{2} }{1/2}[/tex] = [tex]\frac{10\sqrt{2} }{\frac{1}{2} }[/tex] = 20√2