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Kelas 8 MatematikaBab Bangun Ruang
Limas alas persegi
Tinggi segitiga
= √(5² - (1/2 . 6)²)
= √(25 - 9)
= √16
= 4 cm
Luas permukaan
= luas alas + (4 . 1/2 . alas . tinggi)
= (6 . 6) + (2 . 6 . 4)
= 36 + 48
= 84 cm²