Yes. An octagon is an eight sided figure. It is possible that one or more angles are 90 degrees, unless it is a regular octagon, in which case the internal angles will be 135 degrees.
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In a regular octagon, each angle is 135 degrees. If the octagon is not regular, then it can have as many as 6 right angles in it.
Any - it can be acute, right, obtuse, reflex - take your pick! A regular octagon, on the other hand, will have all internal angles measuring 135 degrees. That is, they will all be obtuse.
ANY n-sided polygon has interior angles that sum to 180(n - 2) degrees. For an octagon this is 180 x 6 ie 1080 degrees (so the individual interior angles of a regular octagon are 135 degrees).
An octagon is a 8-sided polygon. Sum of interior angles of octagon = (8 - 2) x 180o = 1080o
An octagon (Latin "octo" = 8)