Which of the following is true of a regular octagon?

It has 8 angles.

It has 7 sides.

All of its sides are congruent.

It has more sides than a decagon.

It's either A) or D), I don't know what congruent means. An octagon has 8 even sides, with 8 interior angles.

The answer must be D) as all of the other's are incorrect;

A) must not be the correct answer as it says "it has 8 angles", instead of the true statement "it has 8 interior angles".