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3.) Keliling Persegi Panjang = 2p + 2l
44 = 2(12) + 2(2l)
44 = 24 + 2l
44-24 = 2l
20 = 2l
20/2 = l
10 = l
5.) Keliling Persegi = 4s
100 = 4s
100/4 = s
25 = s
Luas Persegi = s²
= 25²
= 625
6.) Luas Persegi = s²
16a² = s²
√16a² = s
4a = s
Keliling Persegi = 4s
= 4a.4a
= 16a