Education Technology

VIC: Going Around in Circles

by Texas Instruments


Introduce students to the notion of proof and develop their confidence in construction proof by appropriate step by step scaffolding.


  • Radius
  • Segment
  • Sector
  • Chord
  • Congruent
  • Similar
  • Isosceles

About the Lesson

Students manipulate geometric objects to illustrate a range of circle – angle properties. To help with proving the observations, selected steps and constructions are added successively to the diagram to help students formulate a proof.