Equilateral triangle

<p>An equilateral triangle is a triangle in which all three sides have the same length, and all three angles are equal. Because of these properties, the equilateral triangle is a <a href="/facts/Regular_polygon/ws89Nhpt">regular polygon</a>, occasionally known as the regular triangle. It is the special case of an <a href="/facts/Isosceles_triangle/rvLe3yqK">isosceles triangle</a> by modern definition, creating more special properties.
</p><p>The equilateral triangle can be found in various <a href="/facts/Tessellation/7BWDywXC">tilings</a>, and in <a href="/facts/Polyhedron/UC0p9FTF">polyhedrons</a> such as the <a href="/facts/Deltahedron/qDjkasx9">deltahedron</a> and <a href="/facts/Antiprism/FgP5jIVd">antiprism</a>. It appears in real life in popular culture, architecture, and the study of <a href="/facts/Stereochemistry/XkcRVNwd">stereochemistry</a> resembling the molecular known as the <a href="/facts/Trigonal_planar_molecular_geometry/935Tdp3Y">trigonal planar molecular geometry</a>.
</p>

Equilateral triangle open-in-new

Equilateral triangle