131. Square in a Right Triangle

Square in a Right Triangle: symmedian divides antiparallels in half
URL: http://www.cut-the-knot.org/Curriculum/Geometry/SquareInTriangle.shtml - 24kb - 19 Jun 2006

132. Equidecomposition of a Triangle and a Rectangle

Equidecomposition of a Triangle and a Rectangle
URL: http://www.cut-the-knot.org/Curriculum/Geometry/TriangleRectangle.shtml - 24kb - 19 Jun 2006

133. Loop or Halt

Loop or Halt. An example of an interger iterative process that always halts.
URL: http://www.cut-the-knot.org/Curriculum/Algebra/LoopOrHalt.shtml - 24kb - 19 Jun 2006

134. Rusty Compass Construction of Equilateral Triangle

Rusty Compass Construction of Equilateral Triangle
URL: http://www.cut-the-knot.org/Curriculum/Geometry/RustyCompass.shtml - 24kb - 19 Jun 2006

135. Isogonal Concurrency

Isogonal Concurrency: at every vertex of a triangle consider two isogonal lines. These lines intersect at six points that define three points of concurrency
URL: http://www.cut-the-knot.org/Curriculum/Geometry/Concurrency.shtml - 24kb - 19 Jun 2006

136. Equidecomposition of Two Rectangles

Equidecomposition of Two Rectangles
URL: http://www.cut-the-knot.org/Curriculum/Geometry/TwoRectangles.shtml - 24kb - 19 Jun 2006

137. Midpoints of the Lines Joining In- and Excenters

Midpoints of the Lines Joining In- and Excenters
URL: http://www.cut-the-knot.org/Curriculum/Geometry/InExCircum.shtml - 24kb - 19 Jun 2006

138. The Broken Chord Theorem

The Broken Chord Theorem
URL: http://www.cut-the-knot.org/Curriculum/Geometry/Patruno.shtml - 24kb - 19 Jun 2006

139. Zaslavsky's Theorem

Zaslavsky's Theorem
URL: http://www.cut-the-knot.org/Curriculum/Geometry/Zaslavsky.shtml - 24kb - 19 Jun 2006

140. Tangent and Secant

"Tangent and Secant: Assume TA is tangent to a given circle at point A while a secant through T intersect the circle in points B and C. Let the bisector of angle BTA intersect AB in X and AC in Y. Then nobr
URL: http://www.cut-the-knot.org/Curriculum/Geometry/TangentAndSecant.shtml - 24kb - 19 Jun 2006

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