Polygons and Circles Flashcards
3 Sides
Triangle
4 Sides
Quadrilateral
5 Sides
Pentagon
6 Sides
Hexagon
7 Sides
Heptagon
8 Sides
Octagon
9 Sides
Nonagon
10 Sides
Decagon
11 Sides
Hendecagon
12 Sides
Dodecagon
13 Sides
Tridecagon
14 Sides
Tetradecagon
15 Sides
Pentadecagon
16 Sides
Hexadecagon
17 Sides
Heptadecagon
18 Sides
Octadecagon
A plane figure bounded by straight lines
Polygon
The lines
The sides
The intersections of the lines
Vertices
An angle formed by two consecutive sides of a polygon
Interior angle
An angle formed by one side of a polygon and the adjacent side extended
Exterior angle
Two interior angles at the end of any side
Consecutive angles
Two sides that meet at any vertex
Consecutive or adjacent sides
A line joining two vertices that are not consecutive
Diagonal
A polygon each of whose interior angles is less than 180 degrees
Convex polygon
A polygon with at least one interior angle greater than 180 degrees
Concave polygon
A polygon which is both equiangular and equilateral
Regular polygon
The common point where the bisectors of the interior angles intersect
Center of the polygon
A closed curve in a plane all of whose points are equally distant from a fixed point in the plane called the center
Circle
The perimeter of a circle
Circumference
One half the length of the circumference
Semi-circumference
A line through the center with its ends on the circle
Diameter
A line joining the center with any point on the circle
Radius
Any straight line whose ends are on the circle
Chord
Any portion of a circle
Arc
The arc which represents half a circle; An arc whose measure equals 180 degrees
Semicircle
The arc which represents a quarter of a circle
Quadrant
An arc whose measure is greater than 180 degrees
Major arc
An arc whose measure is less than 180 degrees
Minor arc
