Triangles: Theorems and Problems 19
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![Triangles](../geometry/triangles_index_17.jpg) |
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![Tiangle, Incenter, Angle](../problem/p374_triangle_incenter_17.jpg) |
Proposed
Problem 374.
Triangle, Incenter, Internal Angle Bisectors. |
![Square, Triangle, Area, Circle](../problem/p371_square_circle_17.jpg) |
Proposed
Problem 371.
Square, Inscribed circle, Triangle, Area. |
![Triangle with squares, Circumcircles](../problem/p370_triangle_square_circle.jpg) |
Proposed
Problem 370.
Triangle with squares, Circumcircles, Tangent circles. |
![Triangle, 120 degrees, angle bisectors](../problem/p368_triangle_120_17.jpg) |
Proposed
Problem 368.
Triangle, 120 degrees, Angle bisectors, Perpendicular. |
![Equilateral triangle, circumcircle](../problem/p366_equilateral_triangle_1.jpg) |
Proposed
Problem 366.
Scalene triangle, Circumcircle, Angles, 60 Degrees, Equilateral triangle. |
![Triangle area, Circle, Curvilinear triangle](../problem/p364_triangle_area_17.jpg) |
Proposed
Problem 364.
Obtuse triangle, Congruence, Circles, Diameter, Curvilinear triangle, Area. |
![Right triangle, Congruence, Angles](../problem/p363_right_triangle_17.jpg) |
Proposed
Problem 363.
Right triangle, Congruence, Angles. |
![Right triangle, Incircle, Angle](../problem/p361_right_triangle_circle_.jpg) |
Proposed
Problem 361.
Right triangle, Incircle, Incenter, Tangency points, Angle. |
![Area of Triangle, Circles, Diameters](../problem/p360_area_triangle_17.jpg) |
Proposed
Problem 360.
Area of a triangle, Curvilinear triangles, Circles, Diameters. |
![Isosceles triangle 80 80 20](../problem/p358_triangle_80_80_20_17.jpg) |
Proposed
Problem 358.
Isosceles triangle 80-80-20, Circle, Angles, Congruence. |
![Square, Exterior point, Triangle, Area](../problem/p357_square_area_17.jpg) |
Proposed
Problem 357.
Square, Exterior point, Triangles, Area. |
![Square, Triangle, Area](../problem/p356_square_area_17.jpg) |
Proposed
Problem 356.
Square, Point inside, Triangles, Area. |
![Triangle, Cevian, Incircles, Angles](../problem/p350_incircles_tangent_17.jpg) |
Proposed Problem
350.
Triangle, Cevian, Incircles, Tangents, Tangency Point, Angles. |
![Triangle, Cevian, Incircles](../problem/p349_incircles_tangent_17.jpg) |
Proposed Problem
349.
Triangle, Cevian, Incircles, Tangents, Tangency Point. |
![Triangle, Altitude, Circle, Concyclic points](../problem/p347_triangle_circle_17.jpg) |
Proposed Problem
347.
Triangle, Altitude, Perpendicular, Circle, Concyclic points. |
![Triangle, inscribed circle, tangent](../problem/p341_triangle_circle_17.jpg) |
Proposed Problem
341.
Triangle, Inscribed circle, Tangent, Semiperimeter. |
![Triangle, Angle Bisectors](../problem/p340_triangle_bisectors_17.jpg) |
Proposed Problem
340.
Triangle, Angle Bisectors, Perpendiculars, Distances. Exterior Point. |
![Triangle, Angle Bisectors](../problem/p339_triangle_bisectors_17.jpg) |
Proposed Problem
339.
Triangle, Angle Bisectors, Perpendiculars, Distances. Interior Point. |
![Problem 338 concyclic points](../problem/p338_triangle_concyclic_17.jpg) |
Proposed Problem
338.
Triangle, Circumcircle, Inscribed Circle, Exterior angle bisector, Concyclic points. |
![Triangle, Altitudes, Concyclic Points](../problem/p329_triangle_altitude_17.jpg) |
Proposed Problem
329.
Triangle, Altitudes, Circle, Diameter, Concyclic points. |
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