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Perpendicular Lines, Theorems
and Problems - Table of Content (17)
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![Perpendicular Lines Index](perpendicular_lines_index_1.jpg) |
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![Elearn 230: Triangle, Midpoint, Transversal](http://gogeometry.com/
problem/p230_triangle_midpoint_17.jpg) |
Proposed Problem 230. Triangle, Midpoints, Transversal,
Perpendicular lines.
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![Elearn 229: Triangle, Centroid, Transversal](http://gogeometry.com/
problem/p229_triangle_centroid_17.jpg) |
Proposed Problem 229. Triangle, Centroid, Transversal, Perpendicular
lines, Parallel lines. |
![Elearn 228: Triangle, Midpoint](http://gogeometry.com/
problem/p228_triangle_midpoint_17.jpg) |
Proposed Problem 228. Triangle, Midpoints, Exterior line,
Perpendiculars lines.
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![Elearn 227: Triangle, Centroid](http://gogeometry.com/
problem/p227_triangle_centroid_17.jpg) |
Proposed Problem 227. Triangle, Centroid, Exterior line,
Perpendicular lines, Parallel lines. |
![Problem 226: Triangle, Centroid](http://gogeometry.com/
problem/p226_triangle_centroid_17.jpg) |
Proposed Problem 226. Triangle, Centroid, Perpendicular lines,
Parallel lines. |
![Viviani theorem, isosceles triangle, extension on the base](http://gogeometry.com/
problem/p224_viviani_theorem_17.jpg) |
Proposed Problem 224. Viviani's theorem, Isosceles triangle,
Altitude, Distances, Point on the extension of the base, Perpendicular
lines, Parallel lines. |
![Viviani theorem, Isosceles triangle](http://gogeometry.com/
problem/p223_viviani_theorem_17.jpg) |
Proposed Problem 223. Viviani's theorem, Isosceles triangle,
Altitude, Distances, Perpendicular lines, Parallel lines. |
![Viviani theorem, Equilateral triangle, exterior point](http://gogeometry.com/
problem/p222_viviani_theorem_17.jpg) |
Proposed Problem 222. Viviani's theorem, Equilateral triangle,
Exterior point, Perpendicular lines, Distances. |
![Viviani's theorem I](http://gogeometry.com/
problem/p221_viviani_theorem_17.jpg) |
Proposed Problem 221. Viviani's theorem, Equilateral triangle,
Interior point, Distances, Parallel lines. |
![Rhombus problem](http://gogeometry.com/
problem/p219_rhombus_mean_17.jpg) |
Proposed Problem 219. Rhombus, Perpendicular lines, arithmetic mean,
Parallel lines.
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![Elearn 218: Right triangle](http://gogeometry.com/
problem/p218_right_triangle_17.jpg) |
Proposed Problem 218. Right triangle, Altitude and Projections,
Perpendicular lines, Parallel lines.
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![Elearn 217: Right triangle, Altitude, Projections](http://gogeometry.com/
problem/p217_right_triangle_17.jpg) |
Proposed Problem 217. Right triangle, Altitude and Projections,
Perpendicular lines, Parallel lines.
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![Problem 207: Hypotenuse](http://gogeometry.com/
problem/p207_right_triangle_hypoten.jpg) |
Proposed Problem 207. Right Triangle, Hypotenuse, Inradius, Exradius
relative to the hypotenuse, Perpendicular lines. |
![Elearn 206](http://gogeometry.com/
problem/p206_right_triangle_area_17.jpg) |
Problem 206. Area of a Right Triangle, Inradius, and
Exradius relative to the hypotenuse, Perpendicular lines. |
![Right triangle area](../problem/p205_right_triangle_area_17.jpg) |
Proposed Problem 205. Right Triangle Area, Exradii relatives to legs
or catheti, Perpendicular lines. |
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