Introduction to Geometry

Lecture Plan (Korean)

Cyber University

Geometer's Sketch Pad files:

Euclid's Elements

Sites on Planimeter

Geometry Site organized by University of Tennessee, Knoxville.

Pappus Theorem by Cinderella

Three bar linkage by Cinderella

Dual Theorem of Pappus by Cinderella, a special case

Conic Curve Generaion by Cinderella

Draw tangent lines from a point to a circle (including details in Korean)

Hints on the Midterm Examination(2004/04/28) (Korean)

Help file for theorem 7.5, page 292 (Korean): harmonic.hwp

Lobachevskii (1792-1856)