Click on each angle measurement in your sketch and press the plus sign in between. Click on OK after the third angle is added. Move the triangle again. Add a text box with your name and date and print to hand in. Save your file.
Students are responsible for turning in the printed page of their construction.
Later prints of the dueling pinwheels can be turned in for extra credit. As an extention, students will investigate more complex polygons. Students will create and animate a Geometer's Sketchpad pinwheel. Select the Point tool and click in three different places on the sketch plane to create three points. Deselect the Point tool by clicking on the Selection Arrow tool and click away from the points.