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              In the figure below, AB = BD = AD, angle ACD 
				= 10º, angle CAD = x and angle CBD = x + 30º. Find x. Try to use elementary geometry (Euclid's Elements.)  
                
               
				
				See
				also:Sketch problem 
				9, art 02
 Original problem 
				9
 Original problem 
				9, art 00
 
										
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