Triangle Interior -- from Wolfram MathWorld

The interior of the triangle is the set of all points inside a triangle, i.e., the set of all points in the convex hull of the triangle

Tessellation -- from Wolfram MathWorld Tessellation patterns, Geometric shapes art, Regular polygon

A Triangle Median Meet

Full article: A Note on the Stammler Hyperbola

geometry - In the given triangle with two intersecting cevians, find the area of the shaded quadrilateral. - Mathematics Stack Exchange

How to Calculate Angle Size

CausalGraphEntanglementEntropyGeneralized

PDF) Antiparallels An Overlooked HS Geometry Beauty

Triangle, mathematics

CausalGraphEntanglementEntropyNaive

Pat'sBlog: Antiparallels, an Overlooked HS Beauty

Triangle -- from Wolfram MathWorld

Triangle center - Wikipedia

Cubic Spline - From Wolfram MathWorld, PDF, Spline (Mathematics)