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In the figure shown, ABCD is a square and CDE is equilateral. What is the degree measure of CBE?

 

 Jul 8, 2021
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Note  that  angle ECB   = 90 - 60  =  30

And  note  that in triangle CEB ,  EC  = CB

 

So angles  CBE  and BEC  are   equal  ....so.....angle  CBE  = (180 - 30) / 2   = 150/2 =  75° 

 

cool cool cool

 Jul 8, 2021

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