Jawaban:
60 cm
Nilai x
25² = (3x)² + (4x)²
625 = 9x² + 16x²
625 = 25x²
x² = 625/25
x² = 25
x = √25
x = 5
[tex] \: \: [/tex]
Panjang sisi alas dan sisi tegak
[tex] \: [/tex]
Keliling segitiga
K = jumlah semua sisi
K = 15 + 20 +25
K = 60 cm
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Jawaban:
60 cm
Penjelasan dengan langkah-langkah:
Nilai x
25² = (3x)² + (4x)²
625 = 9x² + 16x²
625 = 25x²
x² = 625/25
x² = 25
x = √25
x = 5
[tex] \: \: [/tex]
Panjang sisi alas dan sisi tegak
[tex] \: [/tex]
Keliling segitiga
K = jumlah semua sisi
K = 15 + 20 +25
K = 60 cm