POLYGONS Flashcards
is a closed two-dimensional figure made up of straight line
segments joined end to end.
POLYGON
The term polygon was derived from two Greek words, __________, which means “many,” and _________, which means “angled.”
POLUS, GONOS
The line segments joined end to end are called the ____________
SIDES
The points, where the line segments meet, are known as the
VERTICES / VERTEX
T/F
A polygon is named by writing the letters of all its vertices in consecutive
order.
TRUE
As vertices that share a common side are called
consecutive vertices
sides that share a common endpoint are called
consecutive or adjacent sides.
In any polygon, angles are formed by adjacent sides. _________________________________________ are angles of a polygon that share a common side.
Consecutive or adjacent angles
3 SIDE POLYGON
TRIANGLE
4 SIDE POLYGON
QUADRILATERAL
5 SIDE POLYGON
PENTAGON
6 SIDE POLYGON
HEXAGON
7 SIDE POLYGON
HEPTAGON
8 SIDE POLYGON
OCTAGON
9 SIDE POLYGON
NONAGON
10 SIDE POLYGON
DECAGON
T/F
The number of sides in a polygon is the same as the number of vertices as well as the number of angles formed.
TRUE
It is a segment that connects any two
nonconsecutive vertices of a polygon.
diagonal.
WHAT IS THE FORMULA IN FINDING DIAGONALS?
n(n-3)
_______
2
A polygon is ______________if all of its sides are congruent (or equal)
A polygon is equilateral
What do you call if all of the angles of a polygon are congruent?
equiangular
If a polygon is both equilateral and equiangular, then it is considered as a
regular polygon
polygon is not equilateral and equiangular, then it is considered as a
irregular polygon.
T/F
Circles and ovals are not polygons because their outlines are curved.
TRUE
