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Circles - Table of Content
(Page 19)
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![Circles](../geometry/circles_index_17.jpg) |
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![Problem 120: Triangle area. Elearning.](../problem/p120_area_triangle_elearn_17.jpg) |
Proposed Problem
120. Area of triangle,
incenter, excircles,
tangent.
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![Elearn 119: Triangle area.](../problem/p119_area_triangle_incenter_17.jpg) |
Proposed Problem
119. Area of triangle,
incenter, excircle,
tangent.
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![Problem 118](../problem/p118_area_triangle_elearn_17.jpg) |
Proposed Problem
118. Area of triangle,
incenter, excenter,
tangent.
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![Elearning 117 Areas](../problem/p117_area_triangle_elearn_17.jpg) |
Proposed Problem
117. Area of triangle,
incenter, excircles,
tangent.
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![Geometry Problem 116](../problem/p116_area_triangle_elearn_17.jpg) |
Proposed Problem
116. Area of triangle, excircles,
tangent.
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![Elearning 115: Problem](../problem/p115_area_triangle_elearn_17.jpg) |
Proposed Problem
115. Area of triangle, excircles,
tangent.
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![Elearning 114: Area](../problem/p114_area_triangle_elearn_17.jpg) |
Proposed Problem
114. Area of triangle, incircle,
excircle.
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![Elearning 113: Areas](../problem/p113_area_triangle_elearn_17.jpg) |
Proposed Problem
113. Area of triangle, incircle,
excircle.
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![Stonehenge and Golden Rectangle](../wonder_world/stonehenge_golden_rectangle_17.jpg) |
Stonehenge builders had geometry skills to rival Pythagoras
Five years of detailed research, carried out by the Oxford University landscape archaeologist Anthony Johnson, claims that Stonehenge was designed and built using advanced geometry.
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![Area of Square and triangle, Elearning.](../problem/p112_area_triangle_elearn_17.jpg) |
Proposed Problem
112. Area of square and triangle.
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![Elearning 111: Orthogonal Circles.](../problem/p111_orthogonal_circle_17.jpg) |
Proposed Problem
111. Orthogonal Circles.
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![Contact Triangle Area. Elearning.](../problem/p110_area_contact_triangle_17.jpg) |
Proposed Problem
110. Area of Contact Triangle.
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![Bandurria, Peruvian Archeological Site](../incas/bandurria_peru_archeology_170.jpg) |
Bandurria is the oldest Peruvian archaeological site, says expert
Bandurria may rival Caral as oldest citadel in Americas.
Satellite View: circular ceremonial center |
![Eight Point Circle Theorem. Elearning](../geometry/eight_point_circle_17.jpg) |
Eight-Point Circle Theorem
Step-by-Step construction, Manipulation, and animation. |
![Circle area problem. Elearning 100](../problem/p100_circle_area_elearning_17.jpg) |
Proposed Problem
100. Circle Area, Archimedes' Book of Lemmas.
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![Circle area and Pythagoras](../problem/p099_circle_area_elearning_17.jpg) |
Proposed Problem 99: Circle Area, General Extension to Pythagoras' Theorem.
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![Elearning 96](../problem/p096_parallelogram_elearning_17.jpg) |
Incircles or inscribed circles.
Proposed Problem
96. Similar Triangles, Incenters, Parallelogram. |
![Problem 95, Elearning](../problem/p095_similarity_elearning_17.jpg) |
Incircles or inscribed circles.
Proposed Problem
95. Similar Triangles, Inradii,
Parallel. |
![Problem 94, Elearning](../problem/p094_triangle_elearning_17.jpg) |
Circumcircles or circumscribed circle
Proposed Problem
94. Similar Triangles, Circumcircles,
Circumradii. |
![Elearning 93 Parallelogram](../problem/p093_triangle_elearning_17.jpg) |
Circumcircles or circumscribed circle
Proposed Problem
93. Similar Triangles, Circumcircles, Parallelogram. |
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