isosceles triangles
... that decorative patterns using isosceles triangles date back to the Early Neolithic?
... that decorative patterns using <b id="mwBVY"><a href="./Isosceles_triangle" id="mwBVc" rel="mw:WikiLink" title="Isosceles triangle">isosceles triangles</a></b> date back to the <a href="./Neolithic#Early_Neolithic" id="mwBVg" rel="mw:WikiLink" title="Neolithic">Early Neolithic</a>?