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dit: banyak siswa gemar bhs?
jb:
pertama cari berapa derajat bhs dulu.
=360 - (170+46+90)
=360 - (306)
=54°
banyak siswa:
54°/360° × 540 orang = 81 siswa
jwban c.
306+x=360
x=360- 306=54
54/360×540= 81 siswa