# Welcome to Pythagoras and Right Triangles Theorems and Problems.

 Recent Additions 31. 30. 29. 28. 27. 26. 25. 24. Right Triangles, Formulas and Facts Pythagorean theorem, Similarity, Geometric mean, hypotenuse, legs, semiperimeter, altitude, median, similar shapes areas, centers, orthocenter, incenter, centroid, circumcenter, radius, inradius, circumradius, exradius, circles, incircle, circumcircle, excircle. 23. Mind Map of the Pythagorean Theorem Proofs by shears, translation, similarity. Facts. 22. Proposed Problem 49. Angles and right triangle. 21. Sangaku Problem 41. "Mickey Mouse" shape: Three circles representing head and ears. 20. 19. Proposed Problem 38. Right Triangle, altitude, incircles, incenters, and angles. 18. Proposed Problem 37. Right Triangle, altitude, incircles, incenters, and orthocenter. Problem 36. Right Triangle, altitude, incircles and inradii. 17. Proposed Problem 34. Right triangle, cevian, incircles, tangents and inradius. 16. 15. 14. Problem 31. Right Triangle, Incircle, Collinears. Problem 30. Right Triangle, Incircle, Inradius. 13. Proposed Problem 29. Right Triangle, altitude, incircle and inradius. Ten conclusions. 12. Problem 29: Geometry Help. Facts you should know. 11. Proposed Problem 28 Right Triangle, altitude, incircles and inradius. 10. Proposed Problem 27 Right Triangle, incircles and inradius. 9. Proposed Problem 26 Right Triangle, altitude, incircles and inradius. 8. Proposed Problem 25 Right Triangle, altitude, incircles and inradius. 7. Proposed Problem 24 Right Triangle, altitude, incircles and inradii. 6. Proposed Problem 23 Right Triangle, altitude, incircles and inradii. 5. Proposed Problem 22 Right Triangle, altitudes, incircles and inradii. 4. Proposed problem 20 Right Triangle, incircles and inradii. 3. Proposed problem 19 Right Triangle and Excenter 2. 1. Geometry: Right Triangles - Topics Squaring the circle? Lunes 1, 2, 3, 4, 5 Problems: 19, 20, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 34, 36, 37, 38, 41, 49

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