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单选题
If the area of a square is 100 cm2, then its perimeter is ______.
A
10cm
B
20cm
C
40cm
D
200cm
E
100cm
参考答案
参考解析
解析:
The area of a square is given by the formula A = s2 where s = the length of its side. 100=S2, S=10. The square’s perimeter is 4×10= 40 cm.
The area of a square is given by the formula A = s2 where s = the length of its side. 100=S2, S=10. The square’s perimeter is 4×10= 40 cm.
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