17 Mar '08 20:12

I was set a question in my maths GCSE class about finding the volume of an octagonal prism, i know whow i would do this; area of the end face times the length but my problem is how on earth do you find the area of that end face. All i know is that its a regular octagon with all sides being 0.8 metres long.

Any prods in the right direction would be very helpful thanks

Any prods in the right direction would be very helpful thanks