A8. The "Perpendicular Line" tool
Draw a line called "s" perpendicular to the line "r" that runs through point "P"
Two secant lines are perpendicular if they define 4 right angles.
1st. Activate the "Perpendicular line" tool 
and then click on line "r" and point "P".
2nd. Name "s" the perpendicular line.
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.
and then click on line "r" and point "P".
2nd. Name "s" the perpendicular line.
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.