The Giant's Causeway is an area in Northern Ireland or nearly 40000 interlocking blocks that were formed from a volcanic eruption. Most of the blocks have the shape of a regular hexagon. The area of the top of one block is 585 cm2 and the distance from each side to the centre is 13 cm. What is the length of each side of a block? Write a math statement to show your solution process and given your final answer.