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= 17² - ( 16 / 2 )²
= 17² - 8²
= 289 - 64
= √225
= 15 cm ✔
luas segitiga
= a × t / 2
= 16 × 15 / 2
= 20 cm ✔
luas permukaan limas
= 20 × 4
= 120 × 4
= 480 cm² ✔
luas permukaan kubus
= 5 × s²
= 5 × 16²
= 1.280 cm² ✔
jumlah keseluruhan
= 480 + 1.280
= 1.760 cm² ✔
yg D jawabannya
maaf klo salah