Perimeter is the distance around the outside of a shape. Farmer John's Pet Farm is getting new fencing and turf for each of the animal enclosures. Have a look at the picture and work out the perimeter ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Using cushions to build a fort, explore the concept of finding the largest area for a fixed perimeter.

Adjust the colors to reduce glare and give your eyes a break. Use one of the services below to sign in to PBS: You've just tried to add this video to My List. But first, we need you to sign in to PBS ...