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=p × l
=15 × 20
=300 m^2
Luas persegi panjang MNPO
=5 × 3
=15 m^2
Luas segitiga RGT
=1/2 × alas × tinggi
=1/2 × 5 × 6
=15 m^2
jadi luas daerah yang raster adalah
=300 - 15 - 15
=270 m^2 (pangkat 2)