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50x = 40 x 175
50x = 7000
x = 7000/50
x = 140
maka, besar sudut COD = 140derajat
5) 120/30 = 44/x
120x = 44 x 30
120x = 1320
x = 1320/120
x = 11
6) gak tau :p sorry
= × 2 × 3,14 ×10
=
= 12,56 cm