Sujet: decagons liste de sujets
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	What is the sum of the measures of the angles of a decagon?		2005-10-15
		Dianna pose la question : What is the sum of the measures of the angles of a decagon? Penny Nom lui répond.
	The sum of the areas of two regular decagons		2002-05-27
		A parent pose la question : The sum of the areas of two regular decagons is 39 square inches, and their radii are in the ratio of 2:3. Find the area of the larger decagon. Paul Betts lui répond.

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