Triangles: Theorems and Problems 7
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![Triangles](../geometry/triangles_index_17.jpg) |
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![Geometry problem 1225](../school-college/3/p1225-equilateral-triangle-bisector-circle-congruence-1.jpg) |
Geometry Problem 1225
Equilateral Triangle, Circumcircle, Angle Bisector, Congruence. |
![Geometry problem 1224](../school-college/3/p1224-triangle-6-parallel-side-class-1.jpg) |
Geometry Problem 1224
Triangle, Parallel to the Sides. |
![Geometry problem 1222](../school-college/3/p1222-doubling-the-cube-triangle-90-120-degrees-class-1.jpg) |
Geometry Problem 1222
Doubling the Cube, Triangle, 90, 120 degrees, Perpendicular, Congruence. |
![Geometry problem 1220](../school-college/3/p1220-scalene-equilateral-triangles-midpoint-class-1.jpg) |
Geometry Problem 1220
Equilateral Triangles, Midpoints, 60 Degrees, Congruence. |
![Geometry problem 1219](../school-college/3/p1219-equilateral-triangles-midpoint-rhombus-tutor-1.jpg) |
Geometry Problem 1219
Equilateral Triangles, Midpoints, 60 Degrees, Congruence, Rhombus. |
![Geometry problem 1218](../school-college/3/p1218-scalene-equilateral-triangles-midpoint-tutor-1.jpg) |
Geometry Problem 1218
Triangle, Equilateral Triangles, Midpoints. |
![Geometry problem 1217](../school-college/3/p1217-triangle-angle-bisector-cyclic-quadrilateral-class-1.jpg) |
Geometry Problem 1217
Triangle, Circle, Excenter, Incenter, Angle Bisector, Cyclic Quadrilateral, Circumcircle, Tangent Line. |
![Geometry problem 1215](../school-college/3/p1215-circle-diameter-chord-midpoint-arc-tutor-1.jpg) |
Geometry Problem 1215
Circle, Diameter, Chord, Radius, Midpoint, Measurement. |
![Geometry problem 1214](../school-college/3/p1214-triangle-3-angle-bisector-class-1.jpg) |
Geometry Problem 1214
Triangle, Three Angle Bisectors, Proportions. |
![Geometry problem 1213](../school-college/3/p1213-triangle-altitudes-circumcircle-cyclic-quadrilateral-1.jpg) |
Geometry Problem 1213
Triangle, Circumcircle, Altitudes, Cyclic Quadrilateral, Congruence. |
![Geometry problem 1212](../school-college/3/p1212-equilateral-triangle-inscribed-hexagon-concurrency-1.jpg) |
Geometry Problem 1212
Equilateral Triangle, Equilateral Hexagon, Concurrent Lines. |
![Geometry problem 1211](../school-college/3/p1211-right-triangle-altitude-bisector-45-degrees-class-1.jpg) |
Geometry Problem 1211
Right Triangle, Altitude, Angle Bisector, 45 Degrees. |
![Geometry problem 1209](../school-college/3/p1209-triangle-excenter-circumcircle-congruence-1.jpg) |
Geometry Problem 1209
Triangle, Circle, Excircle, Excenter, Circumcircle, Congruence. |
![Geometry problem 1208](../school-college/3/p1208-triangle-excenter-diameter-perpendicular-area-1.jpg) |
Geometry Problem 1208
Triangle, Circle, Excircle, Excenter, Diameter, Perpendicular, 90 Degrees, Equal Areas. |
![Geometry problem 1207](../school-college/3/p1207-triangle-incircle-excenter-circumradius-90-degrees-1.jpg) |
Geometry Problem 1207
Triangle, Circle, Incenter, Circumcenter, Excenter, Circumradius, Perpendicular, 90 Degrees. |
![Geometry problem 1206](../school-college/3/p1206-circle-angle-bisector-secant-congruence-area-1.jpg) |
Geometry Problem 1206
Circle, Angle Bisector, Secant, Triangle, Circumcircle, Congruence, Area. |
![Geometry problem 1205](../school-college/3/p1205-napoleon-theorem-inner-outer-centroid-1.jpg) |
Geometry Problem 1205
Triangle, Centroid, Outer and Inner Napoleon Equilateral Triangles. |
![Geometry problem 1204](../school-college/3/p1204-square-triangle-area-class-1.jpg) |
Geometry Problem 1204
Square, Triangle, Area. |
![Geometry problem 1203](../school-college/3/p1203-right-triangle-angle-bisector-quadrilateral-congruence-1.jpg) |
Geometry Problem 1203
Right Triangle, Square, Angle Bisector, Three Congruent Quadrilaterals. |
![Geometry problem 1201](../school-college/3/p1201-triangle-interior-perpendicular-bisector-side-area-1.jpg) |
Geometry Problem 1201
Triangle, Interior Perpendicular Bisector, Midpoint, Area. |
![Geometry problem 1200](../school-college/2/p1200-square-triangles-90-degrees-area-1.jpg) |
Geometry Problem 1200
Square, Right Triangle, Perpendicular, 90 Degrees, Equal Areas. |
![Kaleidoscope of Word Cloud of Triangle based on Poincare Disk Model](../software/word-cloud/kaleidoscope-poincare-disk-word-cloud-triangle-1.jpg) |
Kaleidoscope of Word Cloud of Triangle based on Poincare Disk Model. |
![Geometry problem 1199](../school-college/2/p1199-square-equilateral-triangle-circle-metric-relation-1.jpg) |
Geometry Problem 1199
Equilateral Triangle, Square, Altitude, Circle, Incircle, Inradius, Metric Relations. |
![Geometry problem 1198](../school-college/2/p1198-right-triangle-square-rectangle-quadrilateral-area-1.jpg) |
Geometry Problem 1198
Right Triangle, Square, Rectangle, Quadrilateral, Altitude, Equal Areas. |
![Geometry problem 1197](../school-college/2/p1197-four-squares-triangles-area-1.jpg) |
Geometry Problem 1197
Four Squares, Four Triangles, Equal Areas. |
![Geometry problem 1196](../school-college/2/p1196-parallelogram-midpoint-metric-relation-1.jpg) |
Geometry Problem 1196
Parallelogram, Midpoint, Metric Relations. |
![Geometry problem 1194](../school-college/2/p1194-equilateral-triangle-parallel-perpendicular-metric-relations-1.jpg) |
Geometry Problem 1194
Equilateral Triangle, Perpendicular, Distance, Side, Metric Relations. |
![Geometry problem 1193](../school-college/2/p1193-3-4-5-right-triangle-two-circle-tangent-hypotenuse-1.jpg) |
Geometry Problem 1193
3-4-5 Right Triangle, Congruent Circles, Tangent, Radius. |
![Geometry problem 1192](../school-college/2/p1192-trapezoid-triangle-midpoint-area-1.jpg) |
Geometry Problem 1192
Trapezoid, Triangle, Diagonal, Midpoint, Area, Parallel. |
![Geometry problem 1188](../school-college/2/p1188-triangle-parallelogram-area-trapezoid-congruence-parallel-1.jpg) |
Geometry Problem 1188
Triangle, Parallelogram, Parallel Lines, Trapezoid, Area. |
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