alleryStart learning →How many different rectangles with whole-number sides have perimeter 20 cm? Count a square too.
A5
B10
C6
D4
Answer & Solution
Correct answer: A. 5
Length plus width is 10, giving the pairs 1+9, 2+8, 3+7, 4+6 and 5+5, which is 5 shapes.
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