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√625 = 25
s = 25 cm
2. keliling persegi = 4s
200 ÷ 4 = 50
s = 50 cm
3. (cara penyelesaiannya sama seperti no.1)
√144 = 12 m
4. (cara penyelesaiannya sama seperti no. 2)
72 ÷ 4 = 18 m
5. 1 dosin = 12 buah
12×12 = 144 buah
2.200x200=40.000
3.√144=12m k=12x4=48m
4 72x72=5.184m²
5.12 lusin gelas=1 gros=144 buah