# Drawing Shapes

Insert a marker into the Finch pen mount slot and use it to draw shapes!

## BEGINNER: Outputs Only

Required Lessons: Moving & Turning, Controlling Wheels, Using Multiple Finches (Extension only)

Write a program to draw shapes. Start by drawing a square, then try to draw an equilateral triangle (a triangle with 3 equal sides). Consider how much you need to turn the Finch to draw other regular polygons, such as a hexagon or octagon. Remember that you can use a loop to repeat actions!

Once you have succeeded at regular polygons, move on to shapes where the sides are not all equal – for example, a rectangle or a trapezoid. Add circles by controlling the wheels directly, as shown in the Controlling Wheels module.

Extension: Draw two identical shapes with two robots at the same time.

Utah Valley University’s Creative Learning Studio took this activity further by using the Finch to create Mondrian-inspired art.

Required Lessons: Randomness, Variables

Draw a regular polygon with a random number of sides!

Start by creating a variable named numSides. Set this variable equal to a random number between 3 and 8. Use this variable to draw a polygon with this number of sides. To draw a polygon, the Finch has to turn a total of 360°, so you can divide 360° by the number of sides to find the number of degrees for each turn.

Once you can draw a polygon, make the size of the polygon random too! You will need to create a second variable named sideLength.

## MATERIALS

• Lay down butcher paper, large poster paper, or similar on the table or floor.
• Use washable markers for easy cleanup.

## INTEGRATION

This lesson integrates well with math standards on identifying and classifying polygons.
As shown above, this project can also be integrated with art and art history by connecting Finch drawings to artists such as Mondrian.