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= 36 : 4 = 9 cm
sisi kedua = 27 cm
keliling = 27 x 4
= 108 cm
= 108 - 36
= 72 cm
s = kliling/4
= 36/4
s1 = 9
s2 = 27
kliling = 27*4
= 108
pertmbahan kliling = kliling 2 - kliling 1
= 108 - 36
=72