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RS Aggarwal Solutions Class 8 Chapter-14 Polygons (Ex 14A) Exercise 14.1

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Last updated date: 28th Mar 2024
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Polygons (Ex 14A) Exercise 14.1 - Free PDF

Free PDF download of RS Aggarwal Solutions Class 8 Chapter-14 Polygons (Ex 14A) Exercise 14.1 solved by Expert Mathematics Teachers on Vedantu.com. All Exercise 14.1 Questions with Solutions for Class 8 Maths RS Aggarwal to help you to revise complete Syllabus and Score More marks. Register for online coaching for IIT JEE (Mains & Advanced) and other Engineering entrance exams.

Vedantu is a platform that provides free NCERT Solution and other study materials for students. Students can register and get access to the best and reliable source of study materials specially made by master teachers at Vedantu. Subjects like Science, Maths, English will become easy to study if you have access to NCERT Solution for Class 8 Science, Maths solutions and solutions of other subjects.

Question: How to download Class 8 Chapter 14 RS Aggarwal Solutions?

Answer: Students can download it from Vedantu’s Official website with more FREE resources. 

A closed figure made up of line segments, non-curves, in a two-dimensional plane is called a Polygon. Polygon means many and gon means sides, which literally means 'many sides'. 

No less than three line segments can connect end to end, to make a complete closed figure. The polygon with a minimum of three sides is called Triangle. It is also called 3-gon. An n-sided polygon is termed an n-gon.

Different Types of Polygon

The polygons are classified into different types depending on the number of sides and the measurement of angles-

  • Regular Polygon

In a Regular Polygon, all the sides and interior angles are equal. For example-Rhombus, equilateral triangles, etc.

  • Irregular Polygon

In an Irregular Polygon, all the sides and the interior angles of the polygon are dissimilar. For example- a scalene triangle, a kite, etc.

  • Concave Polygon

In a Concave Polygon, one or more interior angles are more than 180 degrees. A concave polygon should have a minimum of four sides. The vertex points inside of the polygon.

  • Convex Polygon

In Convex Polygon, all the interior angles are always less than 180 degrees. The vertex will always point towards the outside from the centre of the shape.

FAQs on RS Aggarwal Solutions Class 8 Chapter-14 Polygons (Ex 14A) Exercise 14.1

1. Where can I find RS Aggarwal Solutions Class 8 Chapter-14 to understand concepts?

Class 8 Students should first solve the NCERT exercises to get done with basics and then they can move on to reference books and questions on the internet. But NCERT is a must. Class 8 students are recommended to solve RD Sharma and RS Aggarwal by many teachers as it contains many different types of problems that help to clear the concept. The test papers at the end of these books are really useful as it makes an exam-like situation and helps to test a student before a real examination.

2. What are the properties of Polygons according to RS Aggarwal Solutions Class 8 Chapter-14?

A polygon is a two-dimensional shape with straight sides that are completely closed. The properties of polygons depend on their sides and angles, Some of the polygon properties are-

  • The sum total of all the interior angles of an n-sided polygon (n – 2) × 180°.

  • The number of diagonals in a polygon with n sides is always equal to n(n – 3)/2

  • The number of triangles formed by joining the diagonals from one corner of a polygon is always equalled to (n – 2).

  • The measure of each interior angle of an n-sided regular polygon is always equal to [(n – 2) × 180°]/n.

  • The measure of each exterior angle of an n-sided regular polygon is always equal to (360°/n).

3. What are interior angles according to RS Aggarwal Solutions Class 8 Chapter-14?

The Interior angle is the angle of a polygon that is formed inside the 2 adjacent sides. The sum of interior angles of a polygon is always constant. It doesn't matter if the polygon is regular or irregular, the sum total of its interior angles always remains the same. Mathematically, the sum of the interior angles of the polygon is-


Sum of all the Interior Angles of a Polygon = 180 (n-2)°


For example, Triangle has 3 sides and when n=3, The sum of interior angles always comes out to be 180°.

4. What are the properties of the Equilateral Triangle mentioned in RS Aggarwal Solutions Class 8 Chapter-14?

An equilateral angle is a polygon having three equal sides. The term equilateral is divided into two parts where 'equi' which means equivalent and the term 'lateral' means sides. 

Its important properties are-

  •  All 3 sides are equal.

  • All 3 angles of equilateral angle are equal and 60° 

  • Medians, angle bisectors, and altitudes are equal 

  • The dividing perpendicular of the equilateral triangle from the angle of the vertex is parted into 2 equal halves of 30° each.

  • The area of an equilateral triangle is √3/4(t)²

  • The perimeter of an equilateral triangle is 3a. (where ‘t’ is the side of the given equilateral triangle)

5. How to get full marks in class 8 maths?

To score full marks in class 8 maths, firstly the student should have clear concepts. Class 8 introduces some new concepts and advances on old concepts. Class 8 should pay attention in class and ask doubts. Vedantu’s official Youtube channel can also help the child clear their concept. Other than this, a student must practice a lot starting with finishing NCERT Exercises and then moving onto reference books such as RS Aggarwal and RD Sharma. Bringing full marks in class 8 is achievable with a little bit of hard work and the right guidance.