Geometry from the Land of the Incas 56/80

Geometry, Machu Picchu

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Recent Additions (Page 56 of 80)

Geometric Art Index

Math Problem

Proposed Problem 88. Triangle and Quadrilateral Areas, Midpoints.

Math Problem

Proposed Problem 87. Area of Quadrilaterals and Midpoints of Diagonals.

Math Problem

Intouch and Extouch Triangles. Puzzle cut: 20 Piece Classic
Based on
Proposed Problem 86.

Math Problem

Proposed Problem 86. Intouch and Extouch Triangles, Areas

Math Problem

Puzzle: Marion Walter's theorem. Puzzle cut: 12 Piece ZigZag
Based on Marion Walter's theorem

Math Problem

Contact Triangles. Puzzle cut: 22 Piece Polygons
Based on
Proposed Problem 85

Math Problem

Proposed Problem 85. Contact Triangles Areas, Incircle, Excircle.

Math Problem

Proposed Problem 84. Contact Triangles Areas, Incircle, Excircle, Inradius, Exradius.

Math Problem

Proposed Problem 83. Area of the Excircle Contact Triangle, exradius, circumradius.

Math Problem

Proposed Problem 82: Triangle. Area of the Contact Triangle, inradius, circumradius.

Math Problem

Proposed Problem 81: Triangle. Area of a triangle, side, inradius, circumradius.

Math Problem

Proposed Problem 80: Triangle. Area of a triangle, side, incircle, inradius.

Math Problem

Proposed Problem 79: Triangle. Similarity, Altitudes, Orthocenter, Incircles, Inradii.

Math Problem

Proposed Problem 13: Angles of a Triangle. Hints are provided.

Math Problem

Proposed Problem 1: Angles of a Triangle. Midpoint, Congruence. Hints are provided.

I have used Geometry Expressions, the world's first Interactive Symbolic Geometry System, to visualize the Archimedean Twins and check out a variety of conjectures.

Math Problem

Proposed Problem 78: Angles of a Circle. Perpendicular and parallel lines, Midpoint, Diameter, Chord, Cyclic quadrilateral, Congruence.

Math Problem Circle Angles

Proposed Problem 77: Angles of a Circle. Parallel lines, Cyclic quadrilateral.

Sechin Bajo

Plaza in Peru may be the America's oldest urban site
The circular structure at the ruins of Sechin Bajo is about 5,500 years old, archaeologists report.

Area of Circle

Proposed Problem 76: Area of a Circle. Square, Circle, Circular Sector.

problem 75

Proposed Problem 75: Three Intersecting Circles. Cyclic quadrilateral, Angles.
Acquire and demonstrate mathematical reasoning ability when solving problems.

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