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Kpersegi = 4s
72 = 4s
s = AB = 18 cm
Cari tLimas....
tLimas = √PT^2 - (1/2AB)^2
= √15^2 - (18/2)^2
= √225 - 81
= √144
= 12 cm
cari Vlimas....
Vlimas = 1/3Lalas x tLimas
= 1/3 x s^2 x 12
= 18 x 18 x 4
= 1296 cm3,,
no 14) sama dengan no 13) :')