Puzzle 3: Polygons Crossword

A line from the center of a regular polygon at right angles to any of its sides.
The amount of space inside the boundary of a flat object such as a triangle or circle.
A 10-sided polygon.
A seven-sided polygon
A six-sided polygon
a convex quadrilateral with a line of symmetry bisecting one pair of opposite sides. (Two Words)
a quadrilateral whose four sides can be grouped into two pairs of equal-length sides that are adjacent to each other.
An eight-sided polygon
A simple quadrilateral with two pairs of parallel sides.
A five-sided polygon
A polygon with four edges and four vertices
A quadrilateral with four right angles.
A polygon that is equiangular in measure and equilateral. (Two Words)
A simple quadrilateral whose four sides all have the same length.
A regular quadrilateral.
A 4-sided flat shape with straight sides that has a pair of opposite sides parallel.