1. Constructions

2. Supplies Paper (thick stack) Compass Straight Edge

3. Congruent Line Segment Draw a straight line Open compass where the point is on A and the pencil is on B Place point on new end point Make small arc on line A B

4. A B Draw point on arc Result: Congruent Line Segment

5. Segment Bisector (_|_) Select compass size > ½ the line segment Place Point on A make large arc Place Point on B make large arc Look for arc intersections A B

6. Connect “X”s with Straight edge Result: Perpendicular Bisector A B

7. Angle Bisector Set compass Place point on vertex Make arc intersecting both sides Set compass from intersection to intersection Make small arc in the interior from each intersection

8. Draw a straight line from vertex through “X” Result: Angle bisector

9. Congruent Angles Draw a line Make arc on original angle (point on vertex) Make arc on new line Point on end point With compass measure arc length from side to side

10. Draw line from new vertex through “X” Result: Congruent angles

11. How would you … Double a line segment? Increase line segment by Half? Make a 45  angle? A number line? Add two line segments together? Add two angles together?