A4. The "Segment" tool
Draw a segment called "a"
Euclid defined the line as a length without width, with two points at the ends.
1st. Select the "Segment" tool.
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2nd. Click on two different locations in the Graphics View (the segment appears between two points).
3rd. Click on the segment with the right mouse button (on tablets, activate the "Move" tool 
and press the segment) and then click on "Rename".
4th. Type the name "a" and click on "OK".
You can also create two points with the "Point" tool first 
and then click on the points created with the "Segment" tool . With the "Move" tool activated, try to drag the points and the segment with the mouse.
The two curved arrows located in the upper right corner of the Graphics View allow you to reset the activity.
If the activity is correct, you will get 10 points automatically.
.
2nd. Click on two different locations in the Graphics View (the segment appears between two points).
3rd. Click on the segment with the right mouse button (on tablets, activate the "Move" tool and press the segment) and then click on "Rename".
4th. Type the name "a" and click on "OK".
You can also create two points with the "Point" tool first and then click on the points created with the "Segment" tool . With the "Move" tool activated, try to drag the points and the segment with the mouse.
The two curved arrows located in the upper right corner of the Graphics View allow you to reset the activity.
If the activity is correct, you will get 10 points automatically.