This time around we will be
exploring the construction of cylinders. A cylinder is just a prism with
circular bases. The sides will be made of a rectangle that is exactly
as long as the circumference of the circle.
Here is what you need to do:
- Draw a net for a cylinder,
including dimensions and glue flaps. Be EXTREMELY careful that you
measure the diameter of the circle carefully. Your ruler must pass
across the center of the circle, so look for the hole that your compass
made when you drew the circle. Measure to the smallest increment that
your ruler will display, such as 1/16ths of an inch or millimeters.
Your rectangle will be as long as the circumference of the circle. Your
glue flaps should be little tabs so that they can bend easily around
- Cut out your net. Dry fold,
(fold it but don't glue the flaps), to be sure that it works.
- On the front of a piece
of notebook paper, explain in words how to find the surface area for
your cylinder, and then show the mathematics.
- On the back of the notebook
paper explain how to find the volume for your cylinder and then show
- DON'T use the same
dimensions as our example.
here to see our example.