Angle construction
Steps for constructing congruent angles
1. Use ray tool and construct ray AB.
2. Use ray tool and construct ray BC to form angle BAC, make it acute for now.
3. Construct ray DE somewhere below angle BAC.
4. Use compass tool and set radius to AC then center circle at A.
5. Use intersect tool and construct intersection of circle A and ray AB to form point F.
6. Use compass and set radius to AC then center circle at D.
7. Use intersect tool to construct intersection of circle D and ray DE to form G.
8. Use compass tool and set radius to FC and center circle at G.
9. Use intersect tool and construct intersection of circle D and circle G to form H.
10. Use ray tool and create ray DH.
11. Use the angle measure tool and measure angle BAC in that order.
12. Use the angle measure tool and measure angle GDH in that order.
What is going on?
Use the move tool and move points A, B and C around and describe what you notice below
NOTICE
What is going on continued?
Use the move tool and move points G, D and H. Make note of what you notice below.
Notice