Different Types Of Polygons Worksheet With Answers And Key Properties
FAQs on Different Types Of Polygons Worksheet For Practice And Revision
1. What is a polygon in maths?
A polygon is a closed 2D shape made up of straight line segments joined end to end. In geometry, polygons must have:
- Straight sides (no curves)
- At least three sides
- A fully closed figure
2. What are the different types of polygons?
The different types of polygons are classified based on the number of sides and their properties. Common types include:
- Triangle – 3 sides
- Quadrilateral – 4 sides
- Pentagon – 5 sides
- Hexagon – 6 sides
- Heptagon – 7 sides
- Octagon – 8 sides
3. What is a regular polygon?
A regular polygon is a polygon in which all sides and all interior angles are equal. Key features include:
- Equal side lengths
- Equal angle measures
- Symmetrical shape
4. What is an irregular polygon?
An irregular polygon is a polygon where the sides and/or interior angles are not all equal. This means:
- Side lengths may differ
- Angle measures may differ
5. How do you find the sum of interior angles of a polygon?
The sum of interior angles of a polygon is calculated using the formula (n − 2) × 180°, where n is the number of sides. Steps:
- Count the number of sides (n)
- Subtract 2 from n
- Multiply the result by 180°
6. How do you find each interior angle of a regular polygon?
Each interior angle of a regular polygon is found using [(n − 2) × 180°] ÷ n. Steps:
- Find the sum of interior angles
- Divide by the number of sides (n)
7. What is the difference between a convex and a concave polygon?
A convex polygon has all interior angles less than 180°, while a concave polygon has at least one interior angle greater than 180°. Key differences:
- Convex: No indentations, all vertices point outward
- Concave: Has an inward “dent”
8. How many diagonals does a polygon have?
The number of diagonals in a polygon is given by the formula n(n − 3) ÷ 2, where n is the number of sides. Steps:
- Multiply n by (n − 3)
- Divide by 2
9. Can you give an example of classifying polygons by number of sides?
Polygons are classified by counting their sides and using the correct geometric name. Examples:
- 3 sides → Triangle
- 4 sides → Quadrilateral
- 5 sides → Pentagon
- 6 sides → Hexagon
10. What are common mistakes when identifying different types of polygons?
Common mistakes when identifying polygons include miscounting sides and confusing regular and irregular shapes. Students often:
- Count angles instead of sides
- Include curved shapes (which are not polygons)
- Assume all polygons are regular






















