interior angle of 8-sided object, assuming angles are equal

[FrOzeN]

I've done this before but I don't remember the formula or what it's called.

Say I have an 8 sided object, what is the interior angle if they're all equal. Eg, like a 4 sided object (square) would each be 90°.

Thanks

 

[skeeter]

the measure of an interior angle of an equiangular n-gon (n is the number of sides) is 180 - (360/n).

 

[tkhunny]

You can figure it out for ANY regular polygon very simply. The sum of the EXterior angles is ALWAYS 360º. The unterior angle is the complement of the exterior angle. You can see how this all works together in skeeter's formula.