Compass Constructions

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Presentation transcript:

Compass Constructions

Copying A Segment

Step #1: Start with the original segment

Step #2: Using a straightedge, draw a line that is longer than the original segment

Step #3: Place the needle of the compass on point A and the pencil on point B

Step #4: Transfer the distance to the drawn line, making an arc

Step #5: Label the new points A’ and B’. Then erase the excess line.

Bisecting a Segment

Step #1: Place the needle of the compass on point B and the pencil on a point about 3/4 across the segment

Make a semi-circle

Step #2: Maintaining the same distance on your compass, repeat step #1 from point A

Step #3: Label the points of intersection of the semi-circles points C and D

Step #4: Using a straightedge connect points C and D

is the perpendicular bisector of

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