1. Use ray tool and construct ray AB.[br]2. Use ray tool and construct ray BC to form angle BAC, [b]make it acute for now.[br][/b]3. Construct ray DE somewhere below angle BAC.[br]4. Use compass tool and set radius to AC then center circle at A.[br]5. Use intersect tool and construct intersection of circle A and ray AB to form point F.[br]6. Use compass and set radius to AC then center circle at D.[br]7. Use intersect tool to construct intersection of circle D and ray DE to form G.[br]8. Use compass tool and set radius to FC and center circle at G.[br]9. Use intersect tool and construct intersection of circle D and circle G to form H.[br]10. Use ray tool and create ray DH.[br]11. Use the angle measure tool and measure [b]angle BAC in that order.[br][/b]12. Use the angle measure tool and measure [b]angle GDH in that order.[/b][br]

Use the move tool and move points A, B and C around and describe what you notice below

Use the move tool and move points G, D and H. Make note of what you notice below.