Ta có: 64 = 8 x 8, vậy cạnh hình vuông là 8m
Chu vi hình vuông là:
8 x 4 = 32 (m)
Đáp số: 32m
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Một cạnh của hình vuông là:
64 : 8 = 8 (m)
Chu vi hình chữ nhật là:
8 x 4 = 32 (m)
Đáp số: 32 m