جیاوازیی نێوان پێداچوونەوەکانی «ھەشتلا»

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بەبێ کورتەی دەستکاری
:<math>A = 8 \tan \frac{\pi}{8} r^2 = 8(\sqrt{2}-1)r^2 \simeq 3.3137085\,r^2.</math>
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== گالێری ==
<gallery>
پەڕگە:zont 8 ugolnik.jpg|<!--Umbrellas often have an octagonal outline.-->
پەڕگە:Afghancarpet1.jpg|<!--The famous design incorporates an octagonal "elephant's foot" motif.-->
پەڕگە:Eixample.svg|<!--The street & block layout of 's [[Eixample]] district is based on non-regular octagons-->
پەڕگە:Janggipieces.jpg|<!--[[Janggi]] uses octagonal pieces.-->
پەڕگە:Revolving lottery machine,kaitenshiki-cyusenki,japan.JPG|<!--Japanese [[lottery machine]]s often have octagonal shape.-->
</gallery>
 
== سەرچاوەکان ==

مێنۆی ڕێدۆزی