Difference between revisions of "Power of a point theorem"

(Case 2 (Outside the Circle):)
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**Still working
 
**Still working
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==Proof==
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==Problems==
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====Introductory (AMC 10, 12)====
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====Intermediate (AIME)====
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====Olympiad (USAJMO, USAMO, IMO)====

Revision as of 13:01, 23 April 2024

Theorem:

There are three unique cases for this theorem. Each case expresses the relationship between the length of line segments that pass through a common point and touch a circle in at least one point.

Case 1 (Inside the Circle):

If two chords $AB$ and $CD$ intersect at a point $P$ within a circle, then $AP\cdot BP=CP\cdot DP$

Case 2 (Outside the Circle):

Classic Configuration
Tangent Line

Normal Configuration

Tangent Line

Case 3 (On the Border/Useless Case):

    • Still working

Proof

Problems

Introductory (AMC 10, 12)

Intermediate (AIME)

Olympiad (USAJMO, USAMO, IMO)