Geometry-Polygons

Terms	Definitions
Triangles	any polygon with 3 sides and 3 angles
Quadrilateral	a four-sided polygon
Parallelogram	a quadrilateral whose opposite sides are both parallel and equal in length
Trapezoid	a quadrilateral with two parallel sides
Rectangle	a parallelogram with four right angles
Square	a plane rectangle with four equal sides and four right angles
Pentagon	a five-sided polygon
Hexagon	a six-sided polygon
Heptagon	a seven-sided polygon
Octagon	an eight-sided polygon
Nonagon	a nine-sided polygon
Decagon	a polygon with 10 sides and 10 angles
Dodecagon	a twelve-sided polygon
n-gon	a polygon with n sides
diagonals	a segment that connects a vertex to a nonadjacent vertex in a polygon
equilateral	all sides are congruent
equiangular	all angles are congruent
regular	conforming to a standard or pattern
concave	curving inward
convex	curving or bulging outward
interior/exterior angles	Interior are angles on the inside and exterior are angles on the outside
vertices	The point of intersection of two sides of a polygon. The point of intersection of three edges of a space figure.
sides	line segments that form the polygon