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Verified answer
Mapel : MatematikaMateri : Bangun Ruang - Diagonal Bidang
Panjang = 40 cm = 4 dm
Lebar = 10 cm = 1 dm
Tinggi = 30 cm = 3 dm
Diagonal bidang merupakan sisi miring dari segitiga siku-siku antara panjang dan tinggi.
Luas bidang yang diarsir
L = Sisi Miring × Lebar
L = (5 × 1) dm²
L = 5 dm²........................Jawaban (A)
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