Triangles: Theorems and Problems 27




Proposed Problem
154. Triangle, Inradius, Circumradius, Chord. 

Proposed Problem
147. Quadrilateral, Area, Midpoints, Triangle.


Proposed Problem
146. Varignon's Theorem: Quadrilateral, Midpoints, Parallelogram, Area, Perimeter. 

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

Proposed Problem
144. Four Triangles, Incircle, Tangent and Parallel to Side, Inradii. 

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

Proposed Problem
142. Four Triangles, Incircle, Tangent and Parallel to Side, Areas. 

Proposed Problem
141. Triangle, Incircle, Tangent
, Parallel, Perimeters. 

Proposed Problem
140. Triangle, Excircle, Tangent, Semiperimeter. 

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

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


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