Jawaban:
pertama cari x nya dulu
x+2x+3x = 90
6x = 90
x = 15
terus cari sudut DBF nya
DBF = (2x+x)* 15
DBF = 3x*15
DBF = 45°
Ket.
(*) artinya dikali
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Jawaban:
pertama cari x nya dulu
x+2x+3x = 90
6x = 90
x = 15
terus cari sudut DBF nya
DBF = (2x+x)* 15
DBF = 3x*15
DBF = 45°
Ket.
(*) artinya dikali