Go Geometry Education: Orthocenter

Plane Geometry: Circumcircle, Circumradius of a triangle, Theorems and Problems 7

Circumcircle of a triangle - Table of Content 7

Circumcircle Index

 

Geometry Problem 145. Elearning Triangle

Proposed Problem 145. Four Triangles, Circumcircles, Incircle, Tangent and Parallel to Side, Incenters, Circumcenters.

Geometry problem 143

Proposed Problem 143. Circumcircle, Circumcenter.
Four Triangles, Incircle, Tangent and Parallel to Side, Circumradii.

Elearning 139: Triangle Area

Proposed Problem 139. Circumcircle, Circumcenter.
Triangle Area, Orthic Triangle, Semiperimeter, Circumradius.
 

Nagel Theorem

Proposed Problem 138. Circumcircle, Circumcenter.
Nagel's Theorem, Orthic Triangle, Altitudes, Circumradius, Perpendicular.
 

Problem 94, Elearning

Proposed Problem 94. Circumcircles, Circumcenters.
Similar Triangles, Circumcircles, Circumradii.

Elearning 93 Parallelogram

Proposed Problem 93. Circumcircles, Circumcenters.
Similar Triangles, Circumcircles, Parallelogram.

Elearning Problem 92

Proposed Problem 92. Circumcircles, Circumcenters.
Similar Triangles, Circumradii, Parallel.

Proposed Problem 86. Circumcenter of the intouch triangle.
Intouch and Extouch Triangles, Areas. Circumcircle.

Intouch and Extouch Triangles. Puzzle cut: 20 Piece Classic
Based on Proposed Problem 86.

Proposed Problem 83. Circumcircle, Circumcenter.
Area of the Excircle Contact Triangle, exradius, circumradius.

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