missymia missymia

12-05-2014
Mathematics

Answered

a rectangle has an area of 42 square inches which has a greater perimeter the rectangle with the dimensions 21 times 2 or the dimensions 6 times 7

Verified Answer :

Dannymal Dannymal

12-05-2014

A= 42in²
P = 2l + 2w so
(21 x 2) + (2 x 2)
42 + 4 = 46
46 = 21 by 2

Now let's do 6 and 7
(6 x 2) + (7 x 2)
12 + 14 = 26

46 > 26
so 21 by 2 has greater P (perimeter)

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Anonymous Anonymous

12-05-2014

21times 2 because it takes more work

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