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= (45+38) X 30 : 2
= 83 X 30 : 2
= 1.245 cm²
10. luas = D1 X D2 : 2
= 45 X 55 : 2
= 1.237,5 cm²
maaf kalau salah atau kurang jelas
kalau benar, jadikan jawaban terbaik yah.....!
10. 45 : 2 = 22,5 x 55 = 1237,5 x 2 = 2475