**Pre-Algebra 7**

"The highest levels of every human activity demand a solid grasp of the basics, think of tennis or violin. Mathematics happens to require rather a lot of basic knowledge and technique."

Ian Stewart

Ian Stewart

__Proofs__

"It is not enough to believe that something works, that it is a good way to proceed, or even that it is true. We need to know

__it's true. Otherwise, we don't know anything at all."__**why***Letters to a Young Mathematician by Ian Stewart*How many squares are in each perimeter?