Recognizing three-dimensional figures in the real world requires the ability to see parts of a figure. Think about the type of cross-section created if the figure is sliced by a plane.

Visit **this website** and follow the directions below to explore cross sections of different solids.

- Select the first solid.
- Move the slider and observe the cross section to the right of the solid.
- Click on the solid to change the view of the solid.
- Write down your observations in your notes.
- Select a different solid and repeat until all the solids have been viewed.

From your observations of cross sections find the cross sections of the following:

- A cylindrical piece of cheese

Interactive popup. Assistance may be required.

A cylinder can have cross-sections of circle or rectangle.

- A cone

Interactive popup. Assistance may be required.

A cone (without the ice cream) can have cross-sections of a point, circle, oval (ellipse), triangle, parabola, or hyperbola but you'll study these in Algebra II.

- A sphere

Interactive popup. Assistance may be required.

A sphere only has a cross-section of a circle or a single point.