Jawabanmu

2014-05-27T18:02:43+07:00
L juring = 90/360 x 22/7 x 7 x7 = 38.5
l segitiga = 7 x 7 / 2 = 24.5
l tembereng = 38.5 - 24.5 = 14 cm²
2014-05-27T18:11:55+07:00
90 derajat/360 derajat=luas tembereng/luas lingkaran
90x2phi r=360x luas tembereng
90x44/360=luas tembereng
luas tembereng=11
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