Chapter 10 · Class 9 CBSE · Formula Sheet

Circles Formulas — Class 9 CBSE

Study chords, arcs, angles subtended by chords, and properties of cyclic quadrilaterals.

Detailed formula cards for Circles are being prepared. Meanwhile, practice questions to master this topic.

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Worked Examples

1Using: Area of Circle

Find the area of a circle with radius 7 cm.

Step 1: Area = pi x r^2

Step 2: = 22/7 x 49 = 154 sq. cm.

Answer: 154 sq. cm

2Using: Circumference

Find the circumference of a circle with radius 14 cm.

Step 1: C = 2 x pi x r

Step 2: = 2 x 22/7 x 14 = 88 cm.

Answer: 88 cm

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More Class 9 CBSE Formulas

Number SystemsPolynomialsCoordinate GeometryLinear Equations in Two VariablesIntroduction to Euclid's GeometryLines & Angles

Frequently Asked Questions

How many formulas are in Class 9 CBSE Circles?+
There are several key formulas in the Circles chapter for Class 9 CBSE. Each formula is essential for solving problems in this topic.
How to remember Circles formulas easily?+
Practice regularly with worked examples, group related formulas together, and use SparkEd's interactive practice mode to reinforce your memory through problem-solving.
Are these Circles formulas enough for exams?+
Yes, these formulas cover the complete CBSE Class 9 syllabus for Circles. Practice applying them to different types of questions for full exam readiness.

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SparkEd Maths provides free formula sheets for Class 1-10 across 7 education boards. All formulas are aligned to the 2025-26 syllabus.