Hitunglah luas permukaan kubus berukuran:
a. rusuk 21 cm,
b. rusuk 45 cm,
c. rusuk 3,6,
d. rusuk 0,25 m,
e. rusuk (a + b) cm.
a. rusuk 21 cm,
b. rusuk 45 cm,
c. rusuk 3,6,
d. rusuk 0,25 m,
e. rusuk (a + b) cm.
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a. 6 x 21² = 2646 cm²
b. 6 x 45² = 12150 cm²
c. 6 x 3,6² = 77,76
d. 6 x 0,25² = 0,375 m²
e. 6 x 66² = 26136 cm²