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kliling = 2 ( 2a + 5 + 2a-1)
32 = 2 ( 4a +4)
32 = 8a + 8
jawaban soal B
32 - 8 = 8A
24 = 8a
24/8 = a
3 = a
panjang = 2a + 5
= 2(3)+5
= 6 + 5
= 11 cm
lebar = 2a - 1
=2(3)-1
= 5 -1
= 5 cm