Students investigate the properties of angles inscribed in a circle. They use the drawing and measurement tools of Cabri™ Jr. to draw and measure certain angles, and establish the relationship between angles that intercept the same arc. NCTM Geometry Standard covered: Analyze characteristics and properties of 2- and 3-dimensional geometric shapes and develop mathematical arguments about geometric relationships.

Distribute the pages to your class.

Follow the Activity procedures:

• Draw a circle
• Mark two points on the circle to determine an arc
• Draw segments that will form the sides of the inscribed angles
• Mark two points to be the vertices of inscribed angles
• Observe the relationship between the inscribed angles
• Explore other inscribed angle pairs by changing length of arc and vertices
  
  TI-Navigator activity:
  
• Use Screen Capture to check students' progress

Review student results: