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A. Luas :
= 1/2 × 4 cm × 16 cm
= 1/1 × 2 cm × 16 cm
= 32 cm²
Keliling :
= 4 cm + 16 cm + 4 cm + 16 cm
= 8 cm + 32 cm
= 40 cm
B. Luas :
= 1/2 × 1,5 dm × 30 cm
= 1/2 × 15 cm × 30 cm
= 1/1 × 15 cm × 15 cm
= 225 cm²
Keliling :
= 1,5 dm + 30 cm + 1,5 dm + 30 cm
= 15 cm + 30 cm + 15 cm + 30 cm
= 30 cm + 60 cm
= 90 cm
2. Dik = Luas belah ketupat MILO = 846 cm²
Panjang diagonal ML = 36 cm
Panjang diagonal IO = ? cm
= 846 : 36
= 23,5 × 2
= 47 cm
Sory kalau salah