lab_13.md

Triangles, squares and stars

In this lab, you will write your first program to draw some simple shapes on the stage.

Part 1: Drawing a triangle

1. Modify your program from the do now activity to draw a triangle when the number 1 is pressed on the keyboard.

   

2. Modify your script so that the sprite says the word "triangle" while it draws. The sprite should stop saying "triangle" once it has finished drawing.

3. Modify your script so that pressing the space bar clears the pen marks from the stage.

Part 2: Adding more shapes

1. Now that you've drawn a triangle, add scripting to draw the shapes in the following table. Each shape should be drawn when the number next to it is pressed on the keyboard. (For example, pressing 3 on the keyboard should draw a diamond.)

   When this key is pressed...	Draw a ...
   1	Equilateral triangle
   2	Square
   3	Diamond
   4	Pentagon
   5	Parallelogram ("leaning rectangle")
   6 (optional)	5-pointed star

   You may want to draw a diagram like the one above of a triangle to figure out the angles in each shape.

2. Modify your script so the sprite is saying the name of shape. The sprite should stop saying the name of the shape when it is finished drawing.

3. Modify your script so that each different shape is drawn in a different color and with a different line thickness. For example, if the square is drawn in blue with a line thickness of 3, each other shape must be drawn in a color that is not blue and with a line thickness that is not 3.

4. Modify your script so the sprite is hidden when it is not drawing. This will ensure the sprite is not obstructing the view of your beautiful artwork!

5. Save your project as Lab1.3.

Grading rubric

Criteria	Points
Equilateral Triangle	0.25
Square	0.25
Diamond	0.5
Pentagon	0.5
Parallelogram	0.5
Star (bonus!)	0.5
Total	2.0