Jawaban:
pertama cari x dulu
4x+3x+2x = 180
9x = 180
x = 20
terus cari sudut EBC
EBC = 3x
EBC = 3*20
EBC = 60°
Ket.
(*) artinya dikali
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Jawaban:
pertama cari x dulu
4x+3x+2x = 180
9x = 180
x = 20
terus cari sudut EBC
EBC = 3x
EBC = 3*20
EBC = 60°
Ket.
(*) artinya dikali