Controling a construction or not?
the altitude lines of a triangle
option 1: "Draw the 3 of a triangle. What do you see?"
construction steps
Follow the steps:
What do you see?
| stap 1 |  | Select the Polygon tool and clik 3 times in the graph to create the vertexes A, B and C. Click again on the first point A to close the triangle. |
| stap 2 |  | Select the Perpendicular tool. Click on the vertex A and the segment [BC]. |
| stap 3 | | Select the Perpendicular tool. Click on the vertex B and the segment [AC]. |
| stap 4 | | Select the Perpendicular tool. Click on the vertex C and the segment [AB]. |
ready made construction with navigation bar
You can make the construction by yourself the steps are shown by clicking on the navigation bar.
This is an option for students at home to provide them a construction that's correct to overview the steps again at home.