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Primary school mathematics [formal problems]
3. 14x 1x 1x 1/4 = 0.785

1+ 1=2

3. 14x2x2x 1/4 = 3. 14

2+ 1=3

3. 14X3X3X 1/4=7.065

3+ 1=4

3. 14x4x4x 1/4 = 12.56

0.785+3. 14+7.065+ 12.56=23.55

The area is 23.55 square meters.

3. 14x 1x2x 1/4 = 1.57

1+ 1=2

3. 14x2x2x 1/4 = 3. 14

2+ 1=3

3. 14x 3 x2 x 1/4 = 4.7 1

3+ 1=4

3. 14X4X2X 1/4=6.28

1.57+3. 14+4.7 1+6.28+4= 19.7

The circumference is 19.7 cm.