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2. Problems in the first workshop of GIHK

Investigate locus of orthocentre when one vertex moves on a fixed circle.

http://www.geogebratube.org/material/show/id/19143 (Download GeoGebra file)

Given a circle and a chord. Construct a circle tangent to both the given circle and the chord.

http://www.geogebratube.org/material/show/id/19144 (Download GeoGebra file)