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besar sudut mtk = 170+45+45=360
170+90=360
Mtk =360 -260 = 100
banyak siswa gemar MTK
Sudut Mtk/ sudut penuh x banyak siswa
= 100drj/360drj x 72 =7200/360= 20 siswa
mohon maaf bila keliru y, tolong ditelaah kembali.