Mencari nilai x:
[tex]\sf\frac{x}{30} =\frac{7}{21} \\\\\frac{x}{30} =\frac{1}{3} \\\\3x=30\\\\x=\frac{30}{3} \\\\x=10\:cm[/tex]
Jadi, nilai x adalah 10 cm.
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Kesebangunan
Mencari nilai x:
[tex]\sf\frac{x}{30} =\frac{7}{21} \\\\\frac{x}{30} =\frac{1}{3} \\\\3x=30\\\\x=\frac{30}{3} \\\\x=10\:cm[/tex]
Jadi, nilai x adalah 10 cm.