Bisect This
Here is an angle:
- Estimate the location of a point D so that angle ABD is approximately congruent to angle CBD.
- Use compass and straightedge tools to create a ray that divides angle CBA into 2 congruent angles. How close is the ray to going through your point D?
Take turns with your partner, drawing and bisecting other angles.
- For each angle that you draw, explain to your partner how each straightedge and compass move helps you to bisect it.
- For each angle that your partner draws, listen carefully to their explanation. If you disagree, discuss your thinking and work to reach an agreement.