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      Plane Geometry: Area of a triangle, Theorems 
		and Problems - Table of Content - Page 7 | 
    
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		Proposed Problem 110. Area of 
		Contact Triangle.  
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					The Pythagorean Curiosity 
					Triangles and squares, fifteen conclusions.  | 
	
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		Proposed Problem 103.Equilateral 
		Triangle Area, Interior Point, Heron's Formula.
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		Proposed Problem 102.Equilateral 
		Triangle Area, Interior Point.  | 
	
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		Proposed 
		Problem 97. Similar Triangles, 
		Areas.  | 
	
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		Proposed Problem 90. 
		Quadrilateral and Triangle Areas, Midpoints. | 
	
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		Proposed Problem 89. Triangles of equal area, Midpoints. | 
	
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		Proposed Problem 88. Triangle and Quadrilateral Areas, Midpoints. | 
	
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		Proposed Problem 87. Area of 
		Quadrilaterals and Midpoints of Diagonals. Area of triangles. | 
	
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		Proposed Problem 86. Intouch and 
		Extouch Triangles, Areas. | 
	
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