**RS Aggarwal Class 8 Maths Chapter 14 Ex 14.2 Solutions**: This exercise includes topics such as the formula to find the sum of all exterior angles, interior angles, & the number of diagonals in a polygon of the ‘n’ side. The best way of preparing for class 8^{th} Maths final exams is practicing these solutions frequently. The students must solve the questions to examine whether they are completely prepared for the exam or still need more practice. This also makes them able to manage their timings of solving Maths paper.

RS Aggarwal Class 8 Maths Chapter 14 Ex 14.2 Solutions can be used as a handy last-minute revision study material. These solutions are all-inclusive & are created by the mathematics expert that assists the students to clear all their queries related to the concepts of the polygon. These solutions are designed according to the CBSE guidelines & have strong chances to attain excellent ranks in the Class 8^{th} Maths final exam.

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**Download ****RS Aggarwal Class 8 Maths Chapter 14 Ex 14.2 Solutions**

** RS Aggarwal Class 8 Maths Chapter 14 Ex 14.2 Solutions**

**Important Definition for ****RS Aggarwal Class 8 Maths Chapter 14 Ex 14.2 Solutions**

**Exterior angles of a polygon**

They are created when by one of its sides & extending the other side. The sum of all the exterior angles in a polygon is equal to 360 degrees.

**Sum of the Exterior Angles of a Polygon**

Suppose if you begin traveling from the vertex at angle 1. You walk in a clockwise direction, create turns through angles 2, 3, 4, and 5 and come back to the same vertex. You covered the whole perimeter of the polygon and made one complete turn in the procedure. One whole turn is equal to 360 degrees. Therefore, it can be said that ∠1, ∠2, ∠3, ∠4, and ∠5 sums up to 360 degrees.

**Interior angle of a polygon**

It is an angle created inside the two adjacent sides of a polygon. The angle measures at the interior part of a polygon are known as the interior angle of a polygon.

**Sum of Interior Angles of a Polygon**

The sum of the interior angles of a polygon should be a constant value depends on the number of sides. It will provide some constant measurement depends on the number of polygon sides no matter if the polygon is regular or irregular, convex or concave.

The formula of the sum of the interior angles of the polygon is:

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

**Find the number of diagonals in a polygon**

In a polygon, the diagonal is the line segment that joins two non-adjacent vertices. The diagonals of a polygon are in concave polygons, at least one diagonal is actually outside the polygon.

The formula is Number of Diagonals = n(n-3)/2

This formula is simply created by the combination of diagonals that each vertex sends to another vertex and then subtracting the total sides. An n-sided polygon has n-vertices which can be joined with each other in nC2 ways.

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