The sides of A4 paper measure 210 mm by 297 mm.

a) What proportion of the samll side is the larger side? Use a calculator. Your answer should be a decimal number.

b) Square your answer to part a What do you notice?

c) The length of the longer side of A4 paper is the same as length of the shorter side of A3 paper.

Use your answer from part a to find the length of the longer side of A3 paper

d) The length of the longer side of A5 paper is the same length as the shorter side of the A4 paper. Use your answer from part a to find the length

of the shorter side of A5 paper.

e) What is the ratio of the longer side of A5 paper to the longer side of A3 paper?