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Minh Trinh Xuan
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Demonstrations 21  40 of 57
Inequalities for a Malfatti Triangle
Tripolar Coordinates of Soddy Centers
An Inequality Relating the Nagel Point and Exact Trilinear Coordinates
A Quintuple Triangle Inequality
Angles of a Triangle
Distances from the Incenter to the Fermat Points
Distance between Two Fermat Points
An Excircle Inequality
A Triangle Semiperimeter Inequality
Lengths of Sides and Angle Bisectors Are Rational Together
Inequality for a Cevian Involving the Circumradius
Distance between Two Vecten Points
Distance between Two Napoleon Points
Diophantine Equations with Powers of Two or Four for Thirteen Variable Sets
Simultaneous Diophantine Equations for Powers 1, 2, 4 and 6
Distance between the Centers of the NinePoint and Apollonius Circles
Sums of Squares of the Side Lengths and Various Radii of a Triangle
Distance between the Incenter and the Center of the Apollonius Circle
Inequalities for an Exradius of a Triangle
Distance between Two Points Based on a Triangle
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