Pola bilangan segitiga putih
[tex] \frac{n(n - 1)}{2} = \frac{7(7 - 1)}{2} = 21 \\ \\ Pola \: bilangan \: segitiga \: hitam \\ \frac{n}{2} (n + 1) = \frac{7}{2} (7 + 1) = \frac{7}{2} (8) = 28 \\ \\ segitiga \: putih \div segitiga \: hitam \\ 21 \div 28 \\ 3 \div 4 \\ (d)[/tex]
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Pola bilangan segitiga putih
[tex] \frac{n(n - 1)}{2} = \frac{7(7 - 1)}{2} = 21 \\ \\ Pola \: bilangan \: segitiga \: hitam \\ \frac{n}{2} (n + 1) = \frac{7}{2} (7 + 1) = \frac{7}{2} (8) = 28 \\ \\ segitiga \: putih \div segitiga \: hitam \\ 21 \div 28 \\ 3 \div 4 \\ (d)[/tex]