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Hach ADFG (as shown below) and animate D..  Task 2 Draw a triangle ABC and customize AC=40mm, AB=50mm and BC=65mm. Select a point M on [BC] join it to the point P of [BA] such that "AMP= "PMB where these angles values are displayed on the screen. Insert ponit M button animation (both directions) and animate it.  Task3 Draw a rectangel ABCD. Draw a perpendicular line to [DC]from its middle point M. (as shown below). Define an independent variable V taking values from -30 to 30. Insert the bouton animation of V and rotate the rectangle ABCD where the angle rotaion is V and the rotation centre O. Hide the rectangle ABCD.  Lesson 2 : Investigation of mathematics and physics concepts (5 mn) Task 4 This task aims to verify the Pythagoras theorem. Draw two perpendicular lines in I and select on each of them a point (P and M) .Insert buttons animation of P and M. Find the distances MP, IM and IP.. Then through functional variable define MP and the sum S=IM+IP . Animate points M and P  Task 5 This task aims to show motion under gravity. Draw a point A. Define an independent variable x taking discrete values from 0 to 9. Define the functional variable L=gx where g=9.81m"s. Then define the vector  having as lenght L and "90 as direction. Apply the translation of vector  to A. The result is a point B. Insert the animation button of x and animate it. (here 1mm on the sheet represents 1m).  Task 6 This task aims to complete a simple mechnanical system. Draw a circle and click on the tool "Draw radius " that appears in Geometry toolbar to draw a radius OP of this circle. Apply to this radius two rotations of 120 and 240 about the center of the circle. Define an independent variable L taking its values between 3 and 8.. Define a vector  having as length L cm with a direction of "30. Select the circle and the three radius and apply and apply "homothety and translation " where the homothety coefficient is 0.5. Draw the common tangent of the two circles and draw the segment that links the two centers. Insert the animation button of the point P and the animation button of C (both directions). Insert the animation button series of P and C. Click on the animation series button to animate the simple mechanical object.  Task 7 This task aims to complete a simple mechnanical system.with spring animation.  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