If you want to use PowerPoint's capabilities to illustrate how two or more data points compare in magnitude, it might be appropriate in some cases to use proportional shapes to make the comparison.

If you insert a shape in PowerPoint and you want to change it into another different shape without having to delete it or insert another shape into the slide, you can use the Change Shape feature that ...

Change the layout of the slide to blank. Go to the Shapes button on the Home tab and choose a circle from the menu. Draw the circle onto the slide. On the Shape Format tab, you can choose a rectangle ...