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Copying a line segment

This is the step-by-step, printable version. If you PRINT this page, any ads will not be printed.

See also the animated version.

  After doing this Your work should look like this
  Start with a line segment PQ that we will copy. Geometry construction with compass and straightedge or ruler or ruler
Step 1 Mark a point R that will be one endpoint of the new line segment. Geometry construction with compass and straightedge or ruler or ruler
Step 2 Set the compasses' point on the point P of the line segment to be copied. Geometry construction with compass and straightedge or ruler or ruler
Step 3 Adjust the compasses' width to the point Q. The compasses' width is now equal to the length of the line segment PQ. Geometry construction with compass and straightedge or ruler or ruler
Step 4 Without changing the compasses' width, place the compasses' point on the the point R on the line you drew in step 1 Geometry construction with compass and straightedge or ruler or ruler
Step 5 Without changing the compasses' width, Draw an arc roughly where the other endpoint will be. Geometry construction with compass and straightedge or ruler or ruler
Step 6 Pick a point S on the arc that will be the other endpoint of the new line segment. Geometry construction with compass and straightedge or ruler or ruler
Step 7 Draw a line from R to S. Geometry construction with compass and straightedge or ruler or ruler
Step 8 Done. The line segment RS is equal in length (congruent to) the line segment PQ. Geometry construction with compass and straightedge or ruler or ruler

Other constructions pages on this site

Lines

Angles

Triangles

Right triangles

Triangle Centers

Circles, Arcs and Ellipses

Polygons

Non-Euclidean constructions