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= 12² + 5²
= 169
AC = 13
L alas = 12 x 5 : 2 = 30 cm²
K alas = 12+5+13 =30 cm
T = CF = 18 cm
Lprisma = (2x Lalas) + (Kalas x T)
= (2 x 30) + (30 x 18)
= 600 cm²
Vprisma = 1/3 x Lalas x T
= 1/3 x 30 x 18
= 180 cm³
maaf kalo ada yg keliru, semoga membantu :)