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**Question**

9) The length of each side of a regular pentagon is 8.4 cm to 1 decimal place.

a) Complete the error interval for the length of one side.

a) Complete the error interval for the length of one side.

________ ≤ length < ________

**[2 marks]**

b) Complete the error interval for the perimeter.

________ ≤ perimeter < ________

**[1 mark]**