Clancy needs to paint all sides of a triangular prism.

The area of each triangular face is 12 cm².
 

 
What is the total area Clancy needs to paint?

A block is in the shape of a prism.

Its surface is covered in triangles and squares.
 

 
How many triangles and how many squares cover the entire surface of the block?

One face of a cube has a surface area of 25 600 cm².

What is the length (cm) of one edge of the cube?