A tutorial to explore the rotation of shapes around a point.

Interactive Tutorial

1 - Press the button above to start the applet.

2 - Use the top slider to select the shape you want to study. There are 4 choices: a right triangle, a scalene triangle, a rectangle and a parallelogram.

3 - Use the formulas found above to check the area of the polygon for different values of n.

4 - When n increases, what happens to the three areas: that of the circumscribed circle, the polygon and the inscribed circle? See problem 4 in polygons problems.