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Q.

In an equilateral triangle ABC  , D and E   are the mid-points of sides AB and AC respectively. Then find the length of DE.


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a

DE= 1 2 BC  

b

DE= 1 3 BC  

c

DE= 1 4 BC  

d

DE=BC   

answer is A.

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Detailed Solution

Given,
An equilateral triangle ABC.
Also, D is the mid-point of AB and E is the mid-point of AC.
 Question ImageBy mid-point theorem,
DE||BC,DE= 1 2 BC  
The value is DE= 1 2 BC  .
Hence, the correct option is 1.
 
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