10 Largest Cities in the USA (Top 10)

10 Largest Cities in the USA (Top 10)

Matematika matematika

tolong jawab please pakai caranya​

matematika

tolong jawab please pakai caranya​

Jawab:

c. 100°

Penjelcasan dengan langkah-langkah:

Jumlah sudut dalam segitiga = 180°

[tex]m\angle A=\frac{3}{3+2+4}\times 180\textdegree=\frac{3}{9} \times 180\textdegree=60\textdegree\\m\angle B=\frac{2}{3+2+4}\times 180\textdegree=\frac{2}{9} \times 180\textdegree=40\textdegree\\m\angle C=\frac{4}{3+2+4}\times 180\textdegree=\frac{4}{9} \times 180\textdegree=80\textdegree[/tex]

Maka,

[tex]\angle AED=\angle C =80\textdegree[/tex]

Sudut AED dan sudut CED membentuk sudut pelurus, sehingga

[tex]\angle AED + \angle CED=180\textdegree\\80\textdegree+\angle CED=180\textdegree\\\angle CED=180\textdegree-80\textdegree\\\angle CED=100\textdegree[/tex](c)

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