Jawabanmu

Jawaban paling cerdas!
2014-05-04T17:27:38+07:00
Misal sisi sejajar = 3x dan 5x

masukkan pada rumus luas

L = a+b . t/2
120 = 3x+5x . 10 / 2
120 = 8x . 5
120/5 = 8x
24 = 8x
x = 24/8
x = 3

panjang sisi sejajar
3x = 3.3 = 9
5x = 5.3 = 15

pembuktian
L = a+b . t/2
L = 9+15 . 10/2
L = 24.5
L= 120 cm²

begitu, :D
1 5 1
2014-05-04T17:29:02+07:00