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= ( 42 ×30) + ( 1/2 × 30 × 17)
= 1260 + 225
= 1485 cm2
5. luas trapesium + luas persegi panjang
= ( (82+44) × 43 ÷ 2) + (82 × 15)
=2709 + 1230
= 3939 cm2