How many right angles are in a regular pentagon?

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1 Answer
Zor Shekhtman
Dec 28, 2015

There are no right angles among interior angles of a regular pentagon.

Explanation:

If you are interested, it is easy to prove that regular #N#-sided polygon has each interior angle equal to
#phi = 180^o*(N-2)/N# (degrees.)

So in case of a regular #5#-sided polygon (pentagon) the interior angles measure at
#phi = 180^o*(5-2)/5 = 108^o#

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