**Objectives:**

– Calculate the distance between two points

– Calculate the middle coordinates of a segment.

– Solve problems of geometry hovering on simple or complex figures (triangle, quadrangles, circles).

– Calculate lengths, angles, areas and volumes.

**Activity 1:** Using the following geogebra applets, the middle and length formulas of a segment should be obvious to you….

**Length of a segme**nt (use of pythagorean theorement in rectangle triangle)

**Middle of a segment:**

**Exercise 9 Index: **Use this geogebra applet to place the A’, B’, and C’…

**Problem index**

For the calculation of EH, do not forget the relationship of Pythagoras … do the same to calculate the height of the CBF triangle from F…