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							 Geometry Problems 851-860: Triangle, Circle, Square, Area, Parallel, Metric Relations, 30 Degrees, Congruence, Parallelogram. 
							Level: High School, College |  
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		Geometry Problem 851Triangle, Triple side, Angles, 90 Degrees, Special Right triangle, Sides ratio 1:3.
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		Geometry Problem 852Triangle, Incircle, Inradius, Tangent, Metric Relations.
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		Geometry Problem 853Square, Arc, Quadrant, Triangle, Perpendicular, Metric Relations.
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		Geometry Problem 854Triangle, Parallel lines, Parallelogram, Areas, Similarity, Concurrent lines.
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		Geometry Problem 855Quadrilateral, Triangle, Angles, 30 degrees, Congruence, Auxiliary lines.
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		Geometry Problem 856Quadrilateral, Diagonals, Triangle, Angles, 30 degrees, Congruence, Auxiliary lines.
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		Geometry Problem 857Triangle, Median, Midpoint, Angles, 30, 45 Degrees, Congruence, Auxiliary Lines.
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		Geometry Problem 858Isosceles Right Triangle, Cevian, Ratio 2:1, 45 Degrees, Congruence, Angles, Auxiliary Lines.
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		Geometry Problem 859Isosceles Right Triangle, Angles,18, 45 Degrees, Congruence, Perpendicular bisector.
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		Geometry Problem 860Triangle, Three Medians, Parallel, Parallelogram, Area, Congruence.
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