Jawabanmu

2014-06-01T13:31:39+07:00
13) 45derajat = 1/8 keliling lingkaran
jadi panjang busur = 1/8 x 22/7 x 56 = 22 cm (e)
14) 70 = 35cm
      40 = ....
panjang AB = ( 40 x 35 ) : 70 = 20 cm (a)