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= 1/2 x 40 x 30
= 20 x 30
= 600 cm²
kliling = 2 ( 25 + 15)
= 2 ( 40)
= 80 cm
luas layang layang = 1/2 x 30cm x 40cm
luas layang layang = 1/2 x 1200cm²
luas layang layang = 600cm²
keliling layang layang ABCD = 2(AB+BC)
keliling = 2(25cm+15cm)
keliling = 2(40cm)
keliling = 80cm
jadi luas layang layang dan kelilingnya berturut turut adalah 600cm² dan 80cm