Jawaban:
[tex] \frac{(6+6)}{60} = \frac{(3+x)}{40} [/tex]
[tex] \frac{12}{60} = \frac{(3+x)}{40} [/tex]
[tex] \frac{1}{5} = \frac{(3+x)}{40} [/tex]
[tex] 40 = 5(3+x) [/tex]
[tex] 40 = 15+5x[/tex]
[tex] 40-15= 5x[/tex]
[tex] 25 = 5x[/tex]
[tex] \frac{25}{5} = x [/tex]
[tex] x= 5\:cm[/tex]
luas bingkai bawah foto = p × l
= 60 × 5
= 300 cm[tex] ^{2} [/tex] [ A ]
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Jawaban:
[tex] \frac{(6+6)}{60} = \frac{(3+x)}{40} [/tex]
[tex] \frac{12}{60} = \frac{(3+x)}{40} [/tex]
[tex] \frac{1}{5} = \frac{(3+x)}{40} [/tex]
[tex] 40 = 5(3+x) [/tex]
[tex] 40 = 15+5x[/tex]
[tex] 40-15= 5x[/tex]
[tex] 25 = 5x[/tex]
[tex] \frac{25}{5} = x [/tex]
[tex] x= 5\:cm[/tex]
luas bingkai bawah foto = p × l
= 60 × 5
= 300 cm[tex] ^{2} [/tex] [ A ]