The diagram shows a figure that can be decomposed into simple polygons.

✓ 1. Press Continue to begin.

✓ 2. The figure is now decomposed into a regular octagon, square, and semicircle. Drag the points to opposite vertices to decompose the octagon into two trapezoids and a rectangle.

✓ 3. Drag points to one vertex to decompose the octagon into six triangles.

✓ 4. It is possible to decompose the square into two triangles. Drag the point to do that.

✓ 5. Because the top part of the figure is a regular octagon, it is possible to decompose the entire figure into two trapezoids, one rectangle, and a semicircle. Drag the points to do that.

✓ 6. It is possible to decompose the entire figure into 8 triangles, a square, and a semicircle. Drag the points to do that.