

O
Plane Geometry: Open Problems,
High School, College


Open Geometry Problems  Index 7


College Geometry Online


Geometry Problem
715.
Post
a solution
Triangle, Altitudes, Parallel, Circumcircle, Angle, Measurement. 

Problem 690: Distance between the Incenter and the Centroid of a
Triangle.
Post
a solution
Formula in terms of the sides a,b,c. 

Geometry Problem 689.
Post
a solution
Triangle, Three Excircles, Tangency points, Tangent lines, Concurrent Lines, Mind Map. 

Geometry Problem 675.
Post
a solution
Intersecting Circles, Secant, 45 and 90 Degrees, Collinear Points. 

Geometry Problem 674.
Post
a solution
Triangle, Altitude, Angles. 
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By Antonio Gutierrez






