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Given that figure ABCD is a parallelogram and that the length of DE is one-third the length of AD. What is the perimeter of parallelogram ABCD?

Guest May 26, 2017
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 #1
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Where does DE come from, when you have a four-sided figure ABCD ??

Guest May 26, 2017
 #2
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Label one side "a" and the other "b", then:

 

Perimeter =2 x [a + b] . Now, you have to make sure that one side is 1/3 of the other. So, if "a" is 1 meter, then "b" will be 1/3a. So the formula will become:

Perimeter =2 x [a + 1/3a] =2 x [1 + 1/3*1] =2 x [1 1/3] =2 x 4/3 =8/3 =2 2/3 meters.

Guest May 26, 2017
edited by Guest  May 26, 2017

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