Math: Geometry: What's New, Recent Additions, College, High School, Kids - Page 109

Proposed Problem 121. Similarity and Area of triangle, Trisection of Sides.

Huancayo Square the Wankas

Ayacucho Square (Plaza de Armas)
Ayacucho video

Bottema's Theorem:
Triangle and Squares with Interactive Geometry Software
Step-by-Step construction, Manipulation, and animation.

Complete Quadrilateral: Ortholine-Steiner Line.
Step-by-Step construction, Manipulation, and animation

Eight-Point Circle Theorem
Step-by-Step construction, Manipulation, and animation.

Proposed Problem 120. Area of triangle, incenter, excircles, tangent.

Proposed Problem 119. Area of triangle, incenter, excircle, tangent.

Proposed Problem 118. Area of triangle, incenter, excenter, tangent.

Proposed Problem 117. Area of triangle, incenter, excircles, tangent.

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