central triangle in equi triangle
Drag the large red point and explore the relationship between the yellow equilateral triangle and the central bluish triangle formed by the intersections of the three segments.
Finding a point equi-distance from the vertices of N-gon
PARALLELOGRAM-altitude for equi area same base triangles
Trigonometric Addition Formulas
GeoGebra Student Project - Graphs of Derivatives
DP2B-04-P2-ET1 - Changes in Measures of Central Tendency
Pythagoras tree 3D (fractal)