Question

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Answer 1

An equilateral polygon has equal sides
an equilangular polygon has equal angles
a polygon is a figure 3 sides or more.

Answer 2

Yep! But I do agree with @pokemonmaster96 completely. :)

Answer 3

Well, almost completely. One moment!

Answer 4

Same thing @pokemonmaster96 said:

Equilateral polygon - all of its sides have the same length.

Equiangular polygon - all of its angles are equal. If the polygon doesn't intersect itself, then it will have equal sides as well!

Regular polygon - polygon that is both equilateral and equiangular, not intersecting itself.

Polygon - a bunch a line segments connected end-to-end that eventually connects back to the first line segment.

http://www.mathopenref.com/polygon.html