Education Technology

Year 10: Inside Out

by Texas Instruments


  • ACMMG243– Formulate proofs involving congruent triangles and angle properties
  • ACMMG201– Develop the conditions for congruence of triangles


  • Perpendicular
  • Bisector
  • Vertex
  • Congruent
  • S.A.S - Congruency Condition
  • Reflection
  • Transformation

About the Lesson

Students explore the concept of centre through a variety of shapes visually, dynamically and through paper folding. Students then use the TI-Nspire Geometry Application to construct a dynamic representation of the circumcentre of a triangle followed by a proof.