Turn on thread page Beta

maths fencing prob watch

Announcements

    please help im stuck on maths and need help quick i cant work out formuls for regular polygons with set length of 1000m and need the overall formula
    Offline

    2
    ReputationRep:
    what do you need to find out from using the formula, e.g. area etc., and at what level is this, e.g. GCSE, AS, A2 ETC.

    Phil

    i am gcse student and i need formula to work out area
    Offline

    2
    ReputationRep:
    Is this what you want

    Area of triangle = ½ base length x height. ??????


    Phil
    Offline

    0
    ReputationRep:
    hey miniskirt,

    if this is coursework, then you'll get more marks by showing how you worked out your formula, rather than just making it appear out of nowhere.

    for example, for a pentagon, try splitting it up into 5 isosceles triangles and work out the area on one of those triangles. then do the same with hexagons, heptagons and so on... you'll see a pattern begin to emerge, and from that you can get a formula.

    by 'set length 1000m' do you mean perimeter or side length? if it's perimeter then you'll need to divide 1000 by the number of sides to get the side length, and you can use that to work out the area of the little triangles using A = 1/2*base*height.

    my gcse maths coursework is long gone so i don't know what the general formula is but if you're still stuck i'll try to find it out for you.

    meanwhile, try the triangle method and see how it goes!
    ____
    Mace
    Offline

    0
    ReputationRep:
    ok i've got it.

    http://mathforum.org/library/drmath/view/53384.html

    it's a similar situation to your problem (perimeter = 1000m), and it has all the working out. but if you just want the formula, it's...

    (500)^2
    A = -----------------
    n.tan(pi/n)

    ... where n is the number of sides

    i think you'd better check to see if it works first.

    good luck!
    ____
    Mace
    Offline

    0
    ReputationRep:
    oops, that formula didn't come out very well! so here it is again:

    A = (500)^2 / n.tan(pi/n)

    sorry about that!
    Offline

    2
    ReputationRep:
    If not, you could always go to e.g. essaybank, or one of the other essay/coursework pages, to see what other people have done, but I'd say only use their answers to get an idea, don't just copy it out, as you'll probably get caught, and in trouble for cheating.

    Phil
 
 
 
Turn on thread page Beta
Updated: July 11, 2003

University open days

  • University of Buckingham
    Psychology Taster Tutorial Undergraduate
    Fri, 14 Dec '18
  • University of Lincoln
    Mini Open Day at the Brayford Campus Undergraduate
    Wed, 19 Dec '18
  • University of East Anglia
    UEA Mini Open Day Undergraduate
    Fri, 4 Jan '19
Poll
Were you ever put in isolation at school?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Equations

Best calculators for A level Maths

Tips on which model to get

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.