23 terms

SindlingerTEACHER

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