Wikipedia:Fivoarana/*/Dimilafy
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[[Sary:Regular polygon 5.svg|200px|ankavanana|thumb|Dimimira]]
Ny '''dimilafy''' dia karazana endrika iray manana lafy dimy. Antsoina hoe '''dimimira''' izay dimilafy manana lafy dimy mitovy halava.
== Dimimira ==
Ny velaran'ny dimimira manana halavan-dafy tokana ihany dia :
: <math>A = \frac{{t^2 \sqrt {25 + 10\sqrt 5 } }}{4} = \frac{5t^2 \tan(54^\circ)}{4} \approx 1.720477401 t^2.</math>
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