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6.
L = 1/2 . D1 . D2
192 = 1/2 . 24 . D2
192 = 12 D2
D2 = 192 / 12
D2 = 16 cm (A)

7.
L = 1/2 x jumlah sisi sejajar x tinggi
L = 1/2 x (28 + 36) x 6
L = 64 x 3
L = 192 cm² (C)

8.
L = a x t
L = 26 x 16
L = 416 cm² (B)

7.??
8.½×(28+36)×6=½×64×6=½×384=192cm²
9.26×16=416cm²