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alas: 24cm
Dit: k. segitiga
jawab
L=1/2. a.t
84=12t
t=7cm
kelilingnya jadi 24+7+25=56cm
1/2 a.t
84=12t
84/12=7
t=7
sisi miring 25
24+7+25
=56cm
k=56cm
:)