Four congruent circles of centers A, B, C, and D intersect as shown. 
	  If P is 
	  a point on the circle D, prove that PA2 = PB2 + PC2.
 
 


Geometry Problems
		
		Ten problems: 1401-1410
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			Circle
		
		Intersecting Circles
 
              
		                
			
			Congruence
			
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Equilateral Triangle
 
			        
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