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Mathematics Dictionary
Dr. K. G. Shih
Question and Answer
Questions



  • Keyword | J002 - Circle : Circle and tangents
  • Keyword | J010 - Circle : Draw a circle inscribing a triangle
  • Keyword | F134 - Circle : Draw a circle passing three vertices of triangle
  • Keyword | F103 - Circle
    • Draw three circles touch each other with same common tangent
    • Find radius of small circle
  • Keyword | F133 - Circle : Draw 4 circles to tangent triangle ABC
    • 1. Draw 1 in-circle
    • 2. Draw 3 ex-cirlce
  • Keyword | J018 - Circle : Inscribed an equilateral triangle ABC
  • Keyword | F139 - Circle : Inscribed an equilateral triangle ABCD
    • Prove that AB + CD = AD + BC
  • Keyword | F127 - Circum-center of triangle
    • 1. Definition
    • 2. Construction
  • Keyword | J008 - Circum-center theory : Relation with ortho-center
  • C000 - Construction Geometry
    • Keyword | Centroid of triangle : 2/3 rule
    • Keyword | Circum-center of triangle : Circle passing vetices of triangle
    • Keyword | Ex-center of triangle : Circle tangents 3 sides of triangle
    • Keyword | Ex-central triangle : 4 Circles tangent 3 sides of triangle
    • Keyword | In-center of triangle : Circle tangents 3 sides of triangle
    • Keyword | Ortho-center of triangle : Draw pedal triangle
    • Keyword | Trinagle with 3 given heights
    • Keyword | Trinagle with 3 given side
    • Keyword | Triangle with 1 given median and 2 sides
    • Keyword | Triangle with 2 given medians and 1 sides
  • Keyword | S007 - Cubes in cubes
    • Sketch patterns for 5^3


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