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![Online Geometry](../problem/h_geometry_problem_910.jpg)
Geometry Problems 391-400: Triangle, Parallelogram, Parallel lines, Collinear points, Concurrent, Orthocenter, Circumcircle, Congruence, Square, 15 Degree, Equilateral, Trisector
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![Geometry problems 391-400](geometry_problems_391_400_1.jpg) |
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![Triangle, Parallel, Collinear points](../problem/p391_triangle_collinear_17.jpg) |
Proposed
Problem 391.
Triangle, Parallel lines, Collinear points. |
![Triangle, Parallel, Concurrent lines](../problem/p392_triangle_collinear_17.jpg) |
Proposed Problem 392.
Triangle, Parallel lines, Concurrent lines. |
![Triangle, Orthocenter](../problem/p393_triangle_orthocenter_1.jpg) |
Proposed Problem 393.
Triangle, Orthocenter, Circumcircles, Congruence, Collinear. |
![Square, Circle](../problem/p394_square_circle_17.jpg) |
Proposed Problem 394.
Square, 90 Degree Arc, Diagonal, Congruence. |
![Square, 15 degree](../problem/p395_square_15_degree_17.jpg) |
Proposed Problem 395.
Square, 15 Degree, Equilateral triangle. |
![Square, Angle trisectors](../problem/p396_square_trisector_17.jpg) |
Proposed Problem 396.
Square, Angle Trisectors, Congruence, Area. |
![Triangle, Altitude](../problem/p397_triangle_midpoint_17.jpg) |
Proposed Problem 397.
Triangle, Altitude, Midpoints, Congruence. |
![Parallelogram, Area](../problem/p398_area_parallelogram_17.jpg) |
Proposed Problem 398.
Parallelogram, Area, Similarity, Congruence. |
![RIght triangle, Midpoints, Distance](../problem/p399_right_triangle_17.jpg) |
Proposed
Problem 399.
Right triangle, Midpoints, Distance, Pythagorean theorem, Congruence. |
![Triangle, Angle Bisector, Circumcircle](../problem/p400_triangle_circle_17.jpg) |
Proposed Problem 400.
Triangle, Angle bisector, Circumcircle, Perpendicular, Congruence. |
![Geometry problems 401-410](geometry_problems_401_410_1.jpg)
![Geometry problems 381-390](geometry_problems_381_390_1.jpg)
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| By Antonio Gutierrez
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