Chapter 12 of 16
Revision Notes
Circle — Revision Notes
Maharashtra Board · Class 9 · Mathematics
Circle revision notes for Maharashtra Board Class 9 Mathematics: 4 topics in quick points. Part of the Maharashtra Board Class 9 Mathematics syllabus.
44 questions22 flashcards5 concepts
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Key Topics to Revise
1
Basic Concepts of Circle
- A circle is the set of all points in a plane that are equidistant from a fixed point called the center
- The fixed distance from center to any point on the circle is called radius
- A chord is a line segment joining any two points on the circle
2
Properties of Chords
- The perpendicular from the center of a circle to a chord bisects the chord
- Congruent chords of a circle are equidistant from the center
- Chords equidistant from the center are congruent
3
Incircle of a Triangle
- The incircle touches all three sides of the triangle from inside
- The center of the incircle is called the incenter
- The incenter is the point of concurrency of angle bisectors
4
Circumcircle of a Triangle
- The circumcircle passes through all three vertices of the triangle
- The center of the circumcircle is called the circumcenter
- The circumcenter is the point of concurrency of perpendicular bisectors of sides
Get complete notes with diagrams and examples
Full NotesKey Concepts
A circle is the setThe line segment joining the centerTwo important theoremsThe incircle is a circleThe circumcircle passes through all three
Frequently Asked Questions
What are the important topics in Circle for Maharashtra Board Class 9 Mathematics?
Key topics in Circle include Basic Concepts of Circle, Properties of Chords, Incircle of a Triangle, Circumcircle of a Triangle. Study these first, then practise questions on each for Class 9 exams.
How should I revise Circle for Class 9 exams?
Learn the core ideas first, then work through the 44 practice questions on Circle. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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