Jawabanmu

2014-04-21T11:16:12+07:00
Luas lingkaran 22/7 x14 x 14 = 616
luas 1/4 lingkaran 616 : 4 = 154
luas segitiga 1/2 x 14 x 14 = 98
luas arsiran 154-98 = 56
2014-04-21T11:27:37+07:00
Daerah arsir = axt/2 -1/4 x22/7 xrxr = (14(x2)x14/2 =  - 28x14/2 =  - 392/2 )=196 -
(1/4 x22/7 x14 x14 =1/4 x 22 x2x14=1/2x11x2x14
=11/2 x2 x14 =11x14 )= 154
196-154=42