Lesson 20 — Activity 2: Cylinders and Cones


Getting Ready



Below is an example of another product you will have seen very often:





               This is another example of a 3-D object.

The soda can contains two different shapes.

There are two shapes that make up the soda can.

This 3-D object is also made up of faces and edges but has no vertices. It is called a cylinder and cylinders, do not have any vertices because the faces of a cylinder (top side and bottom) do not meet in one location.

This image illustrates the parts of cylinders.

Remember from Activity 1 that 3-D objects are classified as prisms, pyramids, or objects having at least one circle. The two objects you will look at closely in this activity are ones with at least one circle. They are cylinders and cones.

A cylinder is similar to a prism with the two end faces the same but only has one rectangular face (the side of the cylinder).

A cone is a pyramid with one circle face.



Here is what each object looks like.

Go to the assignment page to practise constructing cylinders and cones.

Images courtesy of www.imagesgoogle.com and K&E Studio.