Cuma 2 no kok 1.Keliling segitiga ABC adalah 120 cm.Jika AB BC CA=3:4:5 ,hitung panjang AB= BC= CA= 2.Jika luas segitiga yg alasnya 20 cm adalah 90 cm .Hitunglah tinggginya
RonaldRobi
1.3x+4x+5x = 120 12x = 120 x = 10 AB = 3.10 = 30 BC = 40 CA = 50 2. 90 = 1/2 20 x t 90 = 10t t = 9 cm
Jadikan terbaik ya
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indirakusuma
1. AB+BC+CA = 120 AB = 3/12 x 120 = 30 cm BC = 4/12 x 120 = 40 cm CA = 5/12 x 120 = 50 cm
2. L = 1/2 x alas x tinggi tinggi = 2 x Luas / alas = 2 x 90 / 20 = 9 cm
12x = 120
x = 10
AB = 3.10 = 30
BC = 40
CA = 50
2. 90 = 1/2 20 x t
90 = 10t
t = 9 cm
Jadikan terbaik ya
AB = 3/12 x 120 = 30 cm
BC = 4/12 x 120 = 40 cm
CA = 5/12 x 120 = 50 cm
2. L = 1/2 x alas x tinggi
tinggi = 2 x Luas / alas = 2 x 90 / 20 = 9 cm