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35 = 4x+3x
35 = 7x
x = 35 : 7 =5
3(5) = 15cm
4(5) = 20cm
Jadi keliling segitiga adalah...
a+b+c=15+20+35
= 70cm
sisi miring = 35
Dit: Keliling?
Jwb: Sisi miring²=sisi²+sisi²
35² = (3x)² + (4x)²
1225= 9x² + 16x²
1225/25 = x²
x² = 49
x = √49
x = 7
Keliling = 3x + 4x + 35 = 21 cm+28cm+35cm
Keliling = 84 cm