Open App

Class 7 Exam > Class 7 Videos > Advance Learner Course: Mathematics (Maths) Class 7 > What is a Diagonal?

What is a Diagonal? Video Lecture | Advance Learner Course: Mathematics (Maths) Class 7

FAQs on What is a Diagonal? Video Lecture - Advance Learner Course: Mathematics (Maths) Class 7

1. What is a diagonal?

A diagonal is a line segment that connects two nonadjacent vertices of a polygon or a quadrilateral. It is an internal line that divides the shape into two triangles or two smaller polygons.

2. How are diagonals used in geometry?

Diagonals are used in geometry to determine properties of different shapes. They can help calculate the area of a polygon by dividing it into triangles and finding their areas separately. Diagonals can also be used to find the perimeter of a polygon by summing the lengths of the diagonals and the sides of the shape.

3. What is the formula to calculate the number of diagonals in a polygon?

The formula to calculate the number of diagonals in a polygon is (n * (n - 3))/2, where n represents the number of sides or vertices of the polygon. This formula works for any convex polygon.

4. How many diagonals are there in a hexagon?

A hexagon has six sides and six vertices. Using the formula mentioned earlier, we can calculate the number of diagonals as (6 * (6 - 3))/2 = 9. Therefore, there are nine diagonals in a hexagon.

5. Can diagonals exist in non-polygon shapes?

No, diagonals do not exist in non-polygon shapes. Diagonals are specific to polygons, which are closed shapes with straight sides. Non-polygon shapes like circles or ellipses do not have diagonals as they do not have defined vertices and sides.

About this Video

1.1K Views

4.86/5 Rating

Oct 05, 2025 Last updated

Related Exams

Class 7

Video Description: What is a Diagonal? for Class 7 2025 is part of Advance Learner Course: Mathematics (Maths) Class 7 preparation. The notes and questions for What is a Diagonal? have been prepared according to the Class 7 exam syllabus. Information about What is a Diagonal? covers all important topics for Class 7 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for What is a Diagonal?.

Introduction of What is a Diagonal? in English is available as part of our Advance Learner Course: Mathematics (Maths) Class 7 for Class 7 & What is a Diagonal? in Hindi for Advance Learner Course: Mathematics (Maths) Class 7 course. Download more important topics related with notes, lectures and mock test series for Class 7 Exam by signing up for free.

Description

Video Lecture & Questions for What is a Diagonal? Video Lecture | Advance Learner Course: Mathematics (Maths) Class 7 - Class 7 full syllabus preparation | Free video for Class 7 exam to prepare for Advance Learner Course: Mathematics (Maths) Class 7.

Information about What is a Diagonal?

Here you can find the meaning of What is a Diagonal? defined & explained in the simplest way possible. Besides explaining types of What is a Diagonal? theory, EduRev gives you an ample number of questions to practice What is a Diagonal? tests, examples and also practice Class 7 tests.

	Advance Learner Course: Mathematics (Maths) Class 7 41 videos\|48 docs\|9 tests

Advance Learner Course: Mathematics (Maths) Class 7

41 videos|48 docs|9 tests

Join Course for Free

Explore Courses for Class 7 exam

Objective type Questions

ppt

Previous Year Questions with Solutions

What is a Diagonal? Video Lecture | Advance Learner Course: Mathematics (Maths) Class 7

Exam

study material

Viva Questions

pdf

past year papers

What is a Diagonal? Video Lecture | Advance Learner Course: Mathematics (Maths) Class 7

Summary

practice quizzes

MCQs

Free

shortcuts and tricks

video lectures

mock tests for examination

Sample Paper

Important questions

Extra Questions

Semester Notes

;

Study What is a Diagonal? on the App

Students of Class 7 can study What is a Diagonal? alongwith tests & analysis from the EduRev app, which will help them while preparing for their exam. Apart from the What is a Diagonal?, students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc. The EduRev App will make your learning easier as you can access it from anywhere you want. The content of What is a Diagonal? is prepared as per the latest Class 7 syllabus.

Education Revolution