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Terms & Conditions

Last Updated: March 2026

Welcome to Notebook.

Notebook is a study application designed to help Class 9 & 10 students access notes, important questions (IMP), and previous year question papers (PYQP) for educational purposes. By accessing or using this app, you agree to be bound by these Terms & Conditions. If you do not agree, please discontinue use of the app.

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This app provides educational support content for study purposes only. We strive to maintain accuracy and syllabus alignment with CBSE guidelines. However, we do not guarantee that all information is error-free or fully complete. Students are advised to verify important information with official NCERT textbooks and board guidelines.

2a.
Class 9 Draft Content Notice

Some Class 9 content — particularly Maths — may be based on draft NCERT 2026–27 materials. Chapter lists may differ slightly from the final printed textbook. We recommend cross-checking with your school-issued book.

2b.
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The app tracks local study data including streaks, chapters saved, exam countdown, and days active. This data is stored on your device only and is not transmitted to our servers. Clearing app/browser data will reset all stats.

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Violation of any of these may result in immediate account suspension without refund.

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Users may save notes, Important Questions (IMP), and Previous Year Papers (PYP) inside the app for personal study access. Saved content is for personal educational use only and must not be redistributed, published, or shared outside the app.

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6a.
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Notebook is an independent, student-run educational initiative. It is not affiliated with, endorsed by, or sponsored by NCERT (National Council of Educational Research and Training) or CBSE (Central Board of Secondary Education). "NCERT" and "CBSE" are their respective owners' names and trademarks, used here only to describe the syllabus this content follows. All notes, summaries and questions on Notebook are prepared independently for revision purposes only and are not official NCERT/CBSE publications.

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Notebook is designed for students aged 13 and above. Users under 18 years of age should use this app with awareness of their parent or guardian.

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Last Updated: March 2026

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2a.
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If you have questions about this Privacy Policy, you may contact us at [email protected].

8.
Draft Content Notice

Some Class 9 content in this app may be based on draft NCERT 2026–27 materials. Final chapter lists may vary from printed textbooks.

Operated by Rohit Saini

Grievance Redressal

Last Updated: March 2026

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Operated by Rohit Saini

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About Notebook
Notebook
Study Smart. Score Better.
Version 1.0.0 · CBSE Class 9 & 10

Built for students, by someone who understands the exam pressure.

Notebook is a free study app for Class 9 and Class 10 CBSE students. It brings together chapter notes, important questions, and previous year papers — all in one clean, simple app that works even on slow internet.

Our goal is simple: help every student study smarter, revise faster, and feel more confident before exams — without needing expensive coaching or heavy study material.

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Class 10th Mathematics Chapter 11 Areas Related to Circles – Notes

Class 10 Maths Chapter 11 – Area of sector, segment, composite figures. NCERT notes.

Topics covered in Areas Related to Circles

Frequently asked questions

What topics are covered in Class 10th Mathematics Chapter 11 Areas Related to Circles notes?

This chapter covers: Area and perimeter of sector, Area of segment, Combinations with triangles and rectangles.

Are Areas Related to Circles notes free?

Yes, Notebook gives free NCERT CBSE notes for Class 10 Mathematics.

How to prepare Areas Related to Circles for Class 10 Mathematics exams?

Read the Areas Related to Circles notes first, revise the key topics (Area and perimeter of sector, Area of segment, Combinations with triangles and rectangles), then practise the important questions and previous year questions (PYQ) for this chapter.

Where can I find Class 10th Mathematics Chapter 11 Areas Related to Circles notes for quick revision?

You are on the right page: this notes page for Areas Related to Circles covers Class 10 Mathematics for the CBSE exam 2026-27. Use the tabs on this chapter for notes, important questions and PYQ.

Is Class 10th Mathematics Chapter 11 Areas Related to Circles important for the CBSE exam 2026-27?

Areas Related to Circles is part of the Class 10 Mathematics NCERT CBSE syllabus. Notebook gives notes, important questions and PYQs for it, free.

Also see: Class 10th Mathematics Chapter 11 Areas Related to Circles Important Questions · Class 10th Mathematics Chapter 11 Areas Related to Circles PYQ

Areas Related to Circles

Perimeter and Area of Circle

Circumference = 2πr; Area = πr². A sector is a "pie-slice" of a circle. Area of sector = (θ/360°) × πr². Length of arc = (θ/360°) × 2πr. A segment is the region between a chord and its arc.

Area of Sector and Segment

Area of minor segment = Area of sector − Area of triangle. Area of major segment = πr² − Area of minor segment. These formulas are used to solve problems involving combinations of plane figures.

Areas of Combinations of Figures

Complex areas are found by adding or subtracting simple shapes (circles, triangles, rectangles). E.g., area of a ring = π(R² − r²). Always use π = 22/7 or 3.14 as specified.

Perimeter and Area of Sectors and Segments

Sector: a region bounded by two radii and an arc. Arc length = (θ/360°) × 2πr. Area of sector = (θ/360°) × πr². Perimeter of sector = 2r + arc length. Segment: the region between a chord and the corresponding arc. Area of minor segment = Area of sector − Area of triangle. For θ = 60°, triangle formed is equilateral (area = √3/4 × r²). For θ = 90°, triangle is right-angled isosceles (area = ½r²). Major segment area = πr² − minor segment area. Always express answer in terms of π or use π = 22/7 as specified.

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Other chapters in Mathematics · Class 10
01
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Linear Equations (Two Variables) Class 10 · Mathematics
04
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Quadratic Equations Class 10 · Mathematics
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06
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Coordinate Geometry Class 10 · Mathematics
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