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t. = L x 2
_________
jmlh ssi sjajr
atas= L x 2
____ - alas
t
alas= L x 2
_____ - atas
t
Ket.
jumlah sisi sejajar = alas + atas
Klo ad kslhan mhon di maafkan.
Semoga bermanfaat ^_^