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=70×70
=4.900
jadi luas persegi=4.900 cm
k = 70 cm
ditanya : L?
jawab :
k = 4.s
70 = 4.s
4s = 70
s = 70/4
s = 17,5
L = s.s
= 17,5 . 17,5
= 306,25
jadi luas persegi adalah 306,25 cm^2