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![Online Geometry](../problem/h_geometry_problem_910.jpg)
Geometry Problems 401-410: Area, Triangle, Angle bisector, Circumcircle, Perpendicular bisector, Congruence, Hexagon, Centroid, Similarity, Congruence, Equilateral, Concurrent
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![Geometry problems 401-410](geometry_problems_401_410_1.jpg) |
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![Area of a triangle, Circumcircle, Angle Bisector](../problem/p401_area_triangle_17.jpg) |
Proposed Problem 401.
Area, Triangle, Angle bisector, Circumcircle, Perpendicular bisector,
Congruence.
Puzzle
based on poblem 401. |
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![Hexagon, Centroids](../problem/p402_hexagon_centroid_17.jpg) |
Proposed Problem 402.
Hexagon, Triangle, Centroid, Parallel, Congruence, Similarity. |
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![Circular Sector 90 degrees](../problem/p403_circular_sector_area_1.jpg) |
Proposed Problem 403.
Circular sector, 90 degrees, Circle, Semicircle, Area. |
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![Equilateral triangles](../problem/p404_equilateral_triangle_1.jpg) |
Proposed Problem 404.
External Equilateral triangles, Congruent and Concurrent Lines. |
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![Quadrilateral, 60, 75, 135 degrees](../problem/p405_quadrilateral_60_75_17.jpg) |
Proposed
Problem 405.
Quadrilateral, 60, 75, and 135 degrees, Midpoint. |
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![Right triangle, 15 degrees](../problem/p406_right_triangle_15_30_1.jpg) |
Proposed Problem 406.
Right triangle, 15 degrees, Midpoints, Congruence. |
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![Angle, Circle, Radius, Tangent, Secant, Perpendicular](../problem/p407_circle_angle_17.jpg) |
Proposed Problem 407.
Circle, Angle, Tangent, Perpendicular, Secant, Radius, Center. |
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![Cyclic quadrilateral, Perpendicular, Parallelogram, Congruence](../problem/p408_cyclic_quadrilateral_1.jpg) |
Proposed Problem 408.
Cyclic quadrilateral, Perpendicular, Parallelogram, Congruence. |
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![Quadrilateral, Angles, Diagonals, Perpendicular](../problem/p409_angle_quadrilateral_17.jpg) |
Proposed
Problem 409.
Quadrilateral, Diagonals, Perpendicular, Congruence. |
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![Regular pentagons, Angle](../problem/p410_regular_pentagon_17.jpg) |
Proposed Problem 410.
Two Regular Pentagons, Angle.
Puzzle: 22 piece polygons. |
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![Geometry problems 411-420](geometry_problems_411_420_1.jpg)
![Geometry problems 391-400](geometry_problems_391_400_1.jpg)
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| By Antonio Gutierrez
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