The Incas used trapezoids for all their windows and doors, which withstand
earthquakes well.
|
Quadrilaterals: Theorems and Problems
2
|
|
|
|
Geometry Problem 1182
Two Squares, Four Quadrilaterals, Sum of the Areas, Metric Relations. |
|
Geometry Problem 1181
Cyclic Quadrilateral and Tangential Quadrilateral, Diameter as a Diagonal, Incenter, Circumcenter. |
|
Geometry Problem 1180
Quadrilateral, 120 Degrees, Diagonals, Perpendicular. |
|
Geometry Problem 1176
Cyclic Quadrilateral, Diagonals, Six Diameters, Circles, Collinear Points, Concurrent Lines. |
|
Geometry Problem 1175: Six Tangential or Circumscribed Quadrilaterals Theorem |
|
Geometry Problem 1174
Triangle, Quadrilateral, Double, Triple, Angle, Congruence, Excenter, Angle Bisector. |
|
Geometry Problem 1152.
Triangle, Quadrilateral, Angle, 10, 20, 30 Degrees. |
|
Geometry Problem 1130.
Cyclic Quadrilateral, Diagonals, Angle Bisector, Congruent Angles. |
|
Geometry Problem
1119.
Quadrilateral, Similar Triangles, Midpoints, Equal Ratio, Angles. |
|
Geometry Problem
1097.
Quadrilateral, Inscribed Circle, 90 Degree, Angle, Area. |
|
Geometry Problem
1079.
Quadrilateral, Isosceles Triangle, Diagonals, Double Angle. |
|
Geometry Problem
1075.
Quadrilateral, Right Triangle, 90 Degrees, Isosceles, Midpoint, Distance. |
|
Geometry Problem
1074.
Quadrilateral, Right Triangle, Angles, 15, 22,5, 30, 90 Degrees. |
|
Geometry Problem
1052.
Triangle, Quadrilateral, Three Circumcircles, Circle, Concyclic Points, Cyclic Quadrilateral. |
|
Geometry Problem
1046.
Rectangle, Circle, Circumradius, Metric Relations. |
|
Geometry Problem
1045.
Quadrilateral, Diagonal, Triple Angle, Triangle, Congruence. |
|
Geometry Problem
1041.
Quadrilateral, Perpendicular, Diagonals, Congruence, Metric Relations. |
|
Geometry Problem
1030.
Quadrilateral, Triangle, Area, Midpoint, Parallel lines. |
|
Geometry Problem
1016.
Triangle, 45 Degrees, Area, Triangle, Quadrilateral, Altitude, Bisector. |
|
Geometry Problem
1015.
Right Triangle, Square, Altitude, Metric Relations. |
|
Geometry Problem
1014.
Square, Diagonal, 45 Degrees, Angle, Equal Areas, Triangle, Quadrilateral. |
|
Geometry Problem 995.
Quadrilateral, Perpendicular Diagonals, Perpendicular Bisector, Parallel. |
|
Geometry Problem 961.
Quadrilateral, Trisection, Sides, Sum of Areas. |
|
Geometry Problem 960.
Quadrilateral, Trisection, Sides, Congruence, Similarity, Triangle. |
|
Geometry Problem 955.
Quadrilateral, Triangle, Diagonals, Triangle, Angles, 30, 40, 60, 70 Degrees. |
|
Geometry Problem 946.
Triangle, Quadrilateral, Area, Diagonal, Midpoint, Parallel. |
|
Geometry Problem 925.
Cyclic Quadrilateral, Diagonal, Circle, Angle Bisector, Parallel.
|
|
Geometry Problem 924.
Quadrilateral, Diagonal, Perpendicular, Circle, Tangent, Midpoint, Metric Relations.
|
|
Geometry Problem 923.
Quadrilateral, Quadrangle, Obtuse Angle, Triangle, Diagonal, Inequality, Length.
|
|
Geometry Problem 910.
Bicentric Quadrilateral, Distance between the Incenter and Circumcenter, Incircle, Circumcircle, Circumscribed, Inscribed, Circumradius.
|
|
Geometry Problem 909.
Bicentric Quadrilateral, Incircle, Circumcircle, Circumscribed, Inscribed, Tangent, Inradius,
Distance.
|
|
Geometry Problem 908.
Bicentric Quadrilateral, Incircle, Circumcircle, Circumscribed, Inscribed, Tangent, Inradius.
|
|
Geometry Problem 907.
Bicentric Quadrilateral, Incircle, Circumcircle, Circumscribed, Inscribed, Tangent, Inradius.
|
|
Geometry Problem 906.
Bicentric Quadrilateral, Incircle, Circumcircle, Circumscribed, Inscribed, Perpendicular.
|
|
Geometry Problem 873
Quadrilateral, Diagonal, Triangle, Angle Bisector, Congruence. |
|
Geometry Problem 872
Quadrilateral, Triangle, Angle, 30, 90 degrees. |
|
Geometry Problem 856
Quadrilateral, Diagonals, Triangle, Angles, 30 degrees, Congruence, Auxiliary lines. |
Go to Page:
Previous
|
1 | 2 |
3
| 4
|
5
|
6
|
Next
|
|