1. Sebuah lapangan yang berbentuk segitiga panjang sisinya 4p meter, 3p meter, dan 7p meter. Jika keliling taman itu 84 meter,tentukan panjang setiap sisi segitiga tersebut!
2. Diketahui keliling segitiga ABC adalah 120 cm. Jika AB:BC:AC = 5:4:3, hitung panjang sisi segitiga tersebut!
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Farafanisa18
1) 84 = 4p + 3p + 7p = 14p 6 cm = p 4p = 4 × 6 = 24 cm 3p = 3 × 6 = 18 cm 7p = 7 × 6 = 42 cm
2) AB = 5/12 × 120 = 50 cm BC = 4/12 × 120 = 40 cm AC = 3/12 × 120 = 30 cm
2 votes Thanks 6
zahraaryoko
1) Cara : Keliling = AB + BC + CA 84 = 4p + 3p + 7p 84 = 14p p = 84/14 p = 6
Maka; 4p = 4(6) = 24 cm 3p = 3(6) = 18 cm 7p = 7(6) = 42 cm
2) Cara : Keliling = AB + BC + CA 120 = 5x + 4x + 3x 120 = 12x x = 120/12 = 10
Maka; 5x = 5(10) = 50 cm 4x = 4(10) = 40 cm 3x = 3(10) = 30 cm
= 14p
6 cm = p
4p = 4 × 6 = 24 cm
3p = 3 × 6 = 18 cm
7p = 7 × 6 = 42 cm
2) AB = 5/12 × 120 = 50 cm
BC = 4/12 × 120 = 40 cm
AC = 3/12 × 120 = 30 cm
Keliling = AB + BC + CA
84 = 4p + 3p + 7p
84 = 14p
p = 84/14
p = 6
Maka;
4p = 4(6) = 24 cm
3p = 3(6) = 18 cm
7p = 7(6) = 42 cm
2) Cara :
Keliling = AB + BC + CA
120 = 5x + 4x + 3x
120 = 12x
x = 120/12 = 10
Maka;
5x = 5(10) = 50 cm
4x = 4(10) = 40 cm
3x = 3(10) = 30 cm