Interactive resource
Isosceles triangle
Geometry. Equal sides ↔ equal base angles; apex bisector, median, and altitude coincide. Free interactive GeoGebra resource — adjust parameters in the…
Overview
Equal sides ↔ equal base angles; apex bisector, median, and altitude coincide.
Explanation
Isosceles: equal legs ⇒ equal base angles (and conversely).
The apex bisector, base median, and base altitude are the same line.
Drawing the base altitude often unlocks congruence or length calculations.
How to use
Drag apex A and base point C; watch equal legs, base angles, and the triple line.