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
HOW CAN YOU SAY THAT THE POLYGON IS CONGRUENT?
a. The sides of one polygon must be equal to the corresponding sides of
the other.
b. The angles in one polygon must be equal to the corresponding angles of
the other.
