Online Geometry: Circles, Theorems and Problems

Circles - Table of Content (Page 23)

Pythagoras and Circle Area
 

Brahmagupta's Theorem Cyclic quadrilateral.

Brahmagupta's Corollary Cyclic quadrilateral.

Brahmagupta's Formula  Area of a cyclic quadrilateral.

Mascheroni Construction with compass alone. Midpoint of a segment

Sangaku Proposed Problem 41. "Mickey Mouse."
Three circles, tangents, radii.

Nine-Point Center, Nine-Point Circle, Euler Line.
Interactive illustration.

Lemoine Theorem

Second Ajima-Malfatti Point
Interactive illustration.

First Ajima-Malfatti Point
Animated illustration.

Proposed Problem 39.
Triangle, Incircle, Bisector, Cyclic Quadrilateral and angles.

Proposed Problem 39 Geometry Help.
Facts you should know for the proposed problem 39.

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