Classification of polygons according to the number of sides
How do you classify a polygon by the number of sides?
Classifying Polygons by the Number of Sides
- Triangle. 3 sides.
- Quadrilateral. 4 sides.
- Pentagon. 5 sides.
- Hexagon. 6 sides.
- Heptagon. 7 sides.
- Octagon. 8 sides.
- Nonagon. 9 sides.
- Decagon.
What are the three classifications of polygons?
Concave polygons (at least one of the interior angles is greater than 180°) Convex polygons (all the interior angles are less than 180° Regular polygons (all the sides and angles measure the same) Irregular polygons (all the sides and angles measure different)
How do you classify each polygon?
A polygon is a closed figure made up of lines and angles. A polygon is classified by its number of sides.
What is the correct classification of 7 sided polygon?
In geometry, a heptagon or septagon is a seven-sided polygon or 7-gon.
What type of polygon has 4 sides?
quadrilateral
Definition: A quadrilateral is a polygon with 4 sides. A diagonal of a quadrilat- eral is a line segment whose end-points are opposite vertices of the quadrilateral. In picture below, ABCD is a quadrilateral, AC, BD are the two diagonals.
What type of polygon has 12 sides?
dodecagon
A dodecagon is a 12-sided polygon. Several special types of dodecagons are illustrated above. In particular, a dodecagon with vertices equally spaced around a circle and with all sides the same length is a regular polygon known as a regular dodecagon.
What is a 8 sided shape called?
An octagon is a shape with 8 sides and 8 angles.
What is a 9 sided polygon called?
enneagon
1. A nonagon is also called enneagon, which is derived from a Greek word called enneagonon, which means nine corners. 2. The first use of the word nonagon dates back to the early 17th century, and has a Latin prefix (nona) and a Greek suffix (gon), making it a polygon with nine sides and nine angles.
What type of shape has 8 sides?
regular octagon shape
A regular octagon shape has eight equal sides and eight equal angles. All the sides are of equal length, and all the angles are of equal measure. The sum of the interior angles is 1080°, and the sum of the exterior angles is 360°. In a regular octagon, the interior angle at each vertex is 135°.
Is any 3 sided polygon a triangle?
Triangles are polygons with three sides, so any polygon with three sides is called a triangle.
What is the classification of the polygons according to convexity?
Convex polygons
They are convex when the measure of all the internal angles are less than 180°, implying that the convexity is observed from the outside of the polygon.
How many Decagons are there?
10
Polygons: How Many Sides?
| 3 | triangle, trigon |
|---|---|
| 7 | heptagon |
| 8 | octagon |
| 9 | nonagon, enneagon |
| 10 | decagon |
How do you classify a concave and convex polygon?
A convex polygon has all its interior angles less than 180 degrees whereas a concave polygon has at least one interior angle more than 180 degrees.
What do you call a polygon with 5 sides?
A pentagon is a polygon with 5 sides and 5 angles.
Are you able to classify polygons by their sides and angles?
Polygons are also classified by how many sides (or angles) they have.