Classifying Polygons Flashcards

What is the number of sides in a triangle?

How many sides does a quadrilateral have?

What defines a pentagon?

How many sides does a hexagon have?

What is the number of sides in a heptagon?

An octagon is a polygon with how many sides?

Define the number of sides in a nonagon.

How many sides does a decagon have?

How many sides does a dodecagon have?

What is the general term for a polygon with N sides?

All sides of an equilateral polygon are congruent.

In an equiangular polygon, all angles in the interior are congruent.

A regular polygon is convex and both equilateral and equiangular.

Is a decagon regular?

Can a concave polygon be regular?

What is a convex polygon?

What is a concave polygon?

Classification of Polygons

Triangle: 3 sides.
Quadrilateral: 4 sides.
Pentagon: 5 sides.
Hexagon: 6 sides.
Heptagon: 7 sides.
Octagon: 8 sides.
Nonagon: 9 sides.
Decagon: 10 sides.
Dodecagon: 12 sides.
N-gon: A polygon with N sides, where N can be any integer.

Types of Polygons

Equilateral Polygon: All sides are congruent (equal in length).
Equiangular Polygon: All interior angles are congruent (equal in measure).
Regular Polygon: A convex polygon that is both equilateral and equiangular.

Polygon Regularity

A decagon is regular sometimes, indicating that not all decagons have equal sides and angles.
A concave polygon is regular never, as concave shapes have at least one inward angle.

Polygon Characteristics

Convex Polygon: No line containing a side of the polygon contains a point in the interior, meaning all interior angles are less than 180 degrees.
Concave Polygon: A polygon that is not convex, characterized by having at least one interior angle greater than 180 degrees.

Test your knowledge of different polygons with these flashcards. Each card provides the name of a polygon along with its defining number of sides. Perfect for students looking to reinforce their understanding of geometry.