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# Counting Smallest Squares

Page 3

Before counting quadrilaterals, we'll first start by counting smallest squares or unit squares, the size of a unit square is $$1\times 1$$.

In any regular grid, the number of unit squares is $a\times b$.

(This is quite easy to prove)

## Worked example

In the diagram above, how many unit squares are there in the grid?

Solution:

In any regular grid, the number of unit squares is $$a\times b$$, here, $$a=3$$, $$b=5$$, $$a\times b=15$$, so there are 15 unit squares in the grid.

This is one part of Grids and Quadrilaterals.

Note by Tan Kenneth
2 years, 8 months ago