Jawabanmu

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2014-05-06T17:35:07+07:00
4/15 X 90 = 24 Kalau gak salah yaa
1 5 1
2014-05-06T17:35:53+07:00
90 = a:b = 4:11 <=> a = 4/15 x 90 =24 derajat (a)
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