Lesson 2 - Surface area of solids

In Lesson 1 you collected some three dimensional objects with simple shapes. 

For this activity you need at least one three dimensional object that is made of cardboard and that you can cut up. Check it's ok before you cut!

1. Cut the box to form a net. 

   • Cut the box and along one of its edges, and lay it out flat on the floor. 

   • Use a ruler to draw along the lines and find the shapes that make up the surface of the box, as shown below. 

   • Cut off any tabs that can't be seen from the outside of the box.

2. Consider how the net would have been different if you had cut along a different edge.  

   • Could it look different? 

   • Draw a diagram of how it could have been different.

Task 3

Go back and look again at your collection of three dimensional objects from Lesson 1. 

You will need:

• a few of the objects you used for Lesson 1, try to pick different shapes

• ruler and or a measuring tape.

Complete the following in your exercise book or folder.

1. Draw the nets of three of the objects.

2. Measure the dimensions of the containers you have drawn, and mark the measurements on the nets.