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256 = s^2
s = ✓256
s = 16 cm
L selimut = 4 L segitiga
544 = 4 x 16 x t / 2
544 = 32 t
t = 17
T limas =
T^2 = 17^2 - 8^2
T^2 = 289 - 64
T^2 = 225
T = ✓225
T = 15 (D.)
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