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x = 1/2 diagonal 2
13² = 12² + x²
x² = 169-144
x = √25
x = 5
diagonal 2 = 2.5 = 10 cm
V limas = 1/3 . Lalas . tinggi
= 1 . 1 . 24 . 10 . t
3 2
= 40t
(tingginya tidak dicantumkan dalam soal