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What is the approximate perimeter of triangle DEC is rectangle ABCD has a length of 4.6 cm?

 

 Mar 7, 2021
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Right triangle with equal leg lengths     leg length = 1/2 of 4.6 = 2.3

 

pythag theorem to find hypotenuse     =     sqrt ( 2.3+ 2.32) = 3.25

 

two legs at 3.25   long + 4.6 cm = 11.1 cm   perimeter

 Mar 7, 2021

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