Labels:screenshot | black | graphics OCR: Here in an example of a square which is 4 by 4. There are : 4*4=16 1 cm by 1cm squares 3*3=9 2cm by 2cm squares 2*2=4 3cm by 3cm squares & 1*1=1 4cm by 4cm Add the answers to gether and you get: 1+4+9+16 =30 squares altogether, All the other squares work in the same way the rule is: X „2 x Where x is the length of one side.
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