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Geometry Problem 1146: Triangle, Interior Point, 10, 20, 30, 130 degrees, Congruence. Level: School, College, Mathematics Education

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A point D is inside a triangle ABC (figure below) such that angle ACD = angle BCD = angle CAD = 10 degrees, and angle BAD = 20 degrees. Find the measure of angle CBD.
This entry contributed by Ajit Athle.


 

Geometry Problem 1146: Triangle, Interior Point, 10, 20, 30, 130 degrees, Congruence



 

See also:
Triangles
Angles
Angle Bisector
Congruence

Solution
Kaleidoscope of Problem 1146 base on Poincare Disk Model.
Kaleidoscope of Geometry Problem 1146, iPad Productivity Apps; Adobe Spark Post
Puzzle of problem 1146 (35 quadrilateral pieces)

Selected Topics

Home | SearchGeometry | Problems | All Problems | Open Problems | Visual Index | 10 Problems | Problems Art Gallery | Art | 1141-1150 | Triangles | Angles | Congruence | Last updated: Feb 14, 2016 by Antonio Gutierrez

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