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36= 2a+10
36-10= 2a
26=2a
26/2 =13=a
V = la . t
780 = 1/2.10.13 .t
780 = 195 .t
780/195 = 4= t
K.alas = 36 cm
p.alas = 10 cm
p.kedua sisi siku-siku = 1/2(36 -10)
= 1/2 x 26
= 13 cm
Volume = 780 cm²
Dijawab :
Luas = 1/2 x a x t
= 1/2 x 10 x √13² -(1/2 x 10)²
= 5 x √169 -25
= 5 x √144
= 5 x 12
= 60 cm²
Maka,
Volume = luas alas x t
780 = 60 x t
t = 780/60
t = 13 cm
Jadi, tingginya adalah 13 cm.