Circles And Lines — Formula Sheet
Kerala Board · Class 10 · Mathematics
4 formulas from Circles And Lines (Kerala Board Class 10 Mathematics) on one page, grouped by topic. Includes This creates a special case, Formula.
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Formulas and Key Relations
Perpendicular Chord and Diameter Relationship
This creates a special case
ab = c², where c is half the perpendicular chord length
Point Inside Circle - General Formula
Formula
PX × PY = r² - d², where r is radius, d is distance from center
Point Outside Circle - Tangent Relationship
Formula
PX × PY = d² - r² = PT², where PT is tangent length
Key relations
When two chords AB and CD intersect at point P within a circle, then AP × PB = CP × PD.
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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