Interactive resource
Equilateral triangle
Geometry. Equal sides, 60° angles; altitude, median, and bisector coincide. Free interactive GeoGebra resource — adjust parameters in the browser.
Overview
Equal sides, 60° angles; altitude, median, and bisector coincide.
Explanation
Equilateral: three equal sides and three 60° angles.
Altitude, median, and angle bisector coincide on each line of symmetry.
For side a: height h = (√3/2)a, area S = (√3/4)a².
How to use
Change side length and watch height and area.