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luas = a x t
504 = 24 x t
504/24 = t
21 = t
BE = 21 cm
FB = 24 - 20
= 4 cm
nomer 68
sudut segitiga penuh berjulah 180 maka n adalah..
n = 180 - 78 - 30
= 72
nomer 70
AB = BA = 17 cm
AC = DF = 15 cm
BC = FB = ?
AF = 17 - 8
= 9 cm
nomer 71
CD = 25 - 5 - 5
= 15 cm
nomer 72
PQ = 10 + 9 + 9
= 28 cm
nomer 75
luas = 1/2 x a x t
294 = 1/2 x 21 x t
294 x 2 = 21 t
588 = 21 t
588/21 = t
28 = t
garis miring segitiga
EB = 2 x 35
= 70 cm