Jawabanmu

Jawaban paling cerdas!
2014-06-01T17:27:27+07:00
Jawabanyya
=5/4  x (12+15+13)
=5/4  x 40
= 50 cm
jadi keliling sgtg GHI 50 cm, maaf kalau salah

1 5 1
2014-06-01T17:33:19+07:00
Keliling segitiga DEF = DE + EF +DF = 12 +15+13 = 40 cm
perbandingan DEF : GHI = 4:5
keliling segitiga GHI= 5/4 x 40 = 200/4 = 50 cm