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GeoGebraAula GeoGebra

G-CO.12 Construction #1. Copying a segment.

Steps.

1. Place two points on the screen. point A and point B. 2. Connect the two points, A and B, with a "segment". 3. Place 1 point on the screen, but not on the segment. point C. 4. "Measure" the initial segment AB using a compass. 5. Place the compass on C and "click" the point. 6. Place a new point anywhere on the circle. point D. 7. Connect the two points with a "segment". Line segment CD.

To name a point, right-click on the point after it has been place, and select "show label".

What is true about line segment AB and line segment CD? How do you know?