panjang sisi-sisi sebuah segitiga diketahui x cm, (2*+2) cm, (2*+3) cm. jika kelilingnya 30 cm, panjang sisi terpanjang adalah? tolong di bantu yaaa :)
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30 = x+2x+2+2x+3
30 = 5x+5
30-5 = 5x
x = 25/5
x = 5
sisi terpanjang = 2x+3 = 2(5)+3 = 13 <--
Semoga membantu :)
keliling = x + (2x+2) + (2x+3) = 30
5x + 5 = 30
5x = 30-5
5x = 25
x = 25/5 = 5 cm
maka yang terpanjang = 2x+3 = 2(5) + 3 = 13 cm