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maka luas jajar genjang = alas x tinggi = 10 x 12 = 120
luas jajargenjag = alas x tinggi = 10 x 12 =120 cm peregi
6. E + F = 180 derajat
2x + 13 + 3x + 2 =180 derajat
2x + 3x = 180 - 13 - 2
5x = 165
x = 33
jadi, E = 2.(33)+ 13 =79 DERAJAT