9-point circle and incircle/excircles

Author:Ph_M

Dans un triangle A, B, C et son orthocentre D le cercle des neuf points est tangent au cercle inscrit et aux trois cercles exinscrits des triangles ABC, ABD, ACB, BCD

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Midpoint Theorem Questions: Mild
Perpendicular Lines: Quick Exploration
Pythagorean Theorem: Quick Illustrator
Angle Addition Postulate (V2) - Integer Solutions
Midpoint Theorem (V2): Integer Solutions

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Sequence of Rigid Motions
Chebyshev Polynomials of the Second Kind
สามเหลี่ยมพีทาโกรัส
ecc-mult
assessed practical 11 pd/cos(angle)

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Difference and Slope
Hypergeometric Distribution
Median Value
Integers
Geometric Mean