So let's master this Ctrl+F stuff.
Just keep pressing Ctrl+F - notice how the window alternates between the turtle and the "procedures" page (look at the title bar of the window). Procedure is used in the computer world to describe "teaching the computer something new".

Exercise 9 Teach the turtle to draw a triangle of side 100. Check.

Exercise 10 Teach the turtle to draw a hexagon of side 80. Check.

Once the turtle "knows" a new word, you can use it anywhere - have a look at this example.

Exercise 11 Your turn ... what can you produce with these three new words that you have taught the turtle ... square, triangle, hexagon? Ideas.