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MENCARI KELILING SEGITIGA...
MENCARI KELILING SEGITIGA...
Jawaban:
C.60
Penjelasan dengan langkah-langkah:
[tex]l = \frac{1}{2 } \times ca \times ab \\ 120 = \frac{1}{2 } \times 5x \times 12x \\ 120 = 30x {}^{2} \\ x = \sqrt{ \frac{120}{30} } = \sqrt{4 } = 2 \\ \\ kll = ca + cb + cb \\ = 5x + 12x + 9x + 8 \\ = 26x + 8 \\ = 26(2) + 8 \\ 52 + 8 = 60cm[/tex]
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