Jawabanmu

2014-08-18T13:18:14+07:00
1/2 x 8 x 6 = 24
1/2 x 13 x 8 = 52 
1/2 x 14 x 15 = 105 
1/2 x 20 x 18 = 180
rumus luas segitiga yaitu : 1/2xalasxtinggi
maka sbb;
1/2x8x6=24
2014-08-18T13:23:05+07:00
A. alas = 8 cm, tinggi = 6cm,, luas = 1/2 alas x tinggi = 1/2 8 x 6 = 48/2 = 24
b. luas = 1/2 x 13 x 8 = 104/2 = 52
c. luas = 1/2 x 14 x 15 = 210/2 = 105
d. luas = 1/2 x 20 x 18 = 360/2 = 180
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