a common ratio of 1/4
...that an infinite geometric series with a common ratio of 1/4 was used by Archimedes in 250-200 BC to find the area enclosed by a parabola?
...that an <a class="mw-redirect" href="./Infinite_series" id="mwAhg" rel="mw:WikiLink" title="Infinite series">infinite</a> <a href="./Geometric_series" id="mwAhk" rel="mw:WikiLink" title="Geometric series">geometric series</a> with <b id="mwAho"><a class="mw-redirect" href="./1/4_+_1/16_+_1/64_+_1/256_+_·_·_·" id="mwAhs" rel="mw:WikiLink" title="1/4 + 1/16 + 1/64 + 1/256 + · · ·">a common ratio of 1/4</a></b> (<i id="mwAhw">pictured</i>) was used by <a href="./Archimedes" id="mwAh0" rel="mw:WikiLink" title="Archimedes">Archimedes</a> in 250-200 BC to find the <a class="mw-redirect" href="./Area_(geometry)" id="mwAh4" rel="mw:WikiLink" title="Area (geometry)">area</a> enclosed by a <a href="./Parabola" id="mwAh8" rel="mw:WikiLink" title="Parabola">parabola</a>?