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Junior Cert 2011 : Maths Paper 2

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Comments

  • #92
    her0fire
    Registered Users, Registered Users 2 Posts: 31 ✭her0fire


    Any tips for question 1 ( area and volume ) guys?


  • #93
    juniorcertlol
    Registered Users, Registered Users 2 Posts: 28 ✭juniorcertlol


    need quick reply :O
    can you be asked to write a formal proof on a theorem deduction :O ?


  • #94
    her0fire
    Registered Users, Registered Users 2 Posts: 31 ✭her0fire


    juniorcertlol wrote: »
    need quick reply :O
    can you be asked to write a formal proof on a theorem deduction :O ?

    No


  • #95
    Colm!
    Closed Accounts Posts: 2,014 ✭✭✭Colm!


    No. You'll be expected to know the deductions and how they work, but not asked to prove them.


  • #96
    her0fire
    Registered Users, Registered Users 2 Posts: 31 ✭her0fire


    Colm! wrote: »
    No. You'll be expected to know the deductions and how they work, but not asked to prove them.

    What are deductions by the way?
    I don't think my maths teacher told us


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  • #97
    shadowninty
    Closed Accounts Posts: 3,654 ✭✭✭shadowninty


    For the theorems, must we just draw the diagram and write the proof?


  • #98
    KatiesMusic96
    Registered Users, Registered Users 2 Posts: 14 ✭KatiesMusic96


    imtryan wrote: »
    Is ANYONE else doing the project maths paper

    Yeah I am! I'm freaking out because I found the mock paper really hard, I hate project maths :(


  • #99
    Desire.
    Closed Accounts Posts: 1,601 ✭✭✭Desire.


    Just need a bit of clarification.

    For the circumcirlce, do you bisect two angles, or two sides?


  • #100
    Indiego
    Closed Accounts Posts: 4,850 ✭✭✭Indiego


    Desire. wrote: »
    Just need a bit of clarification.

    For the circumcirlce, do you bisect two angles, or two sides?

    For the circumcircle you bisect two sides, for the incircle you bisect two angles :)


  • #101
    Colm!
    Closed Accounts Posts: 2,014 ✭✭✭Colm!


    Circumcircle is bisecting lines.
    Incircle is bisecting angles.
    EDIT: CURSE YOU INDIEGOOOOOOOOOOOOO


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  • #102
    Slow Show
    Registered Users, Registered Users 2 Posts: 4,248 ✭✭✭Slow Show


    Some Geometry C parts are absolutely terrifying...I've looked back and done the last three years and now I'm too scared to do anymore. Attempt marks and hoping that it dawns on me in an exam scenario are my only hope for tomorrow...:(

    (2008 3C makes no sense, even with a marking scheme...but hey, it was only worth 10 marks in the end, probably because it was answered badly. <3 the marking sheme.)


  • #103
    her0fire
    Registered Users, Registered Users 2 Posts: 31 ✭her0fire


    Hey guys, any of you guys have tips on drawing a histogram? I'm completely confused lol


  • #104
    shadowninty
    Closed Accounts Posts: 3,654 ✭✭✭shadowninty


    her0fire wrote: »
    Hey guys, any of you guys have tips on drawing a histogram? I'm completely confused lol

    Don't draw it in blood!


  • #105
    ohdechertig
    Closed Accounts Posts: 68 ✭✭ohdechertig


    her0fire wrote: »
    What are deductions by the way?
    I don't think my maths teacher told us

    Deductions are things that are true due to the theorems. For example, if the angle at the centre of the circle is a straight line, then the angle above it is a right angle.

    Another deduction is that opposite angles on a cyclic quadrilateral equal 180 degrees.


  • #106
    shadowninty
    Closed Accounts Posts: 3,654 ✭✭✭shadowninty


    her0fire wrote: »
    Hey guys, any of you guys have tips on drawing a histogram? I'm completely confused lol

    If there are 6 things in the 0-10 category, draw as normal
    if there are 18 things in the 30-60 category tho, there are three 10 parts so you divide 18 by 3 to get 6


  • #107
    rorrissey
    Registered Users, Registered Users 2 Posts: 584 ✭✭✭rorrissey


    I'm far too stressed to check if there's been mention of this before, but is there going to be a pie chart? Because I have no idea how to draw those! :(


  • #108
    Desire.
    Closed Accounts Posts: 1,601 ✭✭✭Desire.


    rorrissey wrote: »
    I'm far too stressed to check if there's been mention of this before, but is there going to be a pie chart? Because I have no idea how to draw those! :(

    Say if there are 20 people out of 98 people who don't know how to draw pie charts. You would put 20 over 98 and multiply it by 360. That would be the length of the angle.

    You then just draw with a compass and protractor.


  • #109
    TheRedDevil10
    Registered Users, Registered Users 2 Posts: 1,261 ✭✭✭TheRedDevil10


    pie chart came up last year do probably won't come up tomorrow


  • #110
    joshissocool
    Closed Accounts Posts: 4 ✭joshissocool


    if youre given a histogram, how do you calculate the table? completely confused!


  • #111
    Desire.
    Closed Accounts Posts: 1,601 ✭✭✭Desire.


    joshissocool wrote: »
    if youre given a histogram, how do you calculate the table? completely confused!

    If you double the base, you half the height.


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  • #112
    Slow Show
    Registered Users, Registered Users 2 Posts: 4,248 ✭✭✭Slow Show


    I'm trying to remember how to even construct a pie chart...I'd say it'd come back to me if I started at it though!

    I haven't even looked at theorems yet, or memorised the different symmetry things...I'm such a failure, I better just be in a mathematical mood tomorrow.


  • #113
    Cakes.
    Registered Users, Registered Users 2 Posts: 2,152 ✭✭✭Cakes.


    Do we need to know how to do a Pie Chart ? :confused:


  • #114
    shadowninty
    Closed Accounts Posts: 3,654 ✭✭✭shadowninty


    Slow Show wrote: »
    ...I'm such a failure

    Ah don't say that :)


  • #115
    cantanstrophe
    Registered Users, Registered Users 2 Posts: 144 ✭✭cantanstrophe


    shadowninty wrote: »
    Don't draw it in blood!
    It's better to use a ruler than a crazy straw to get the lines straight :)


  • #116
    Louise6
    Closed Accounts Posts: 26 ✭Louise6


    I am actually praying phytagoras stays away this year. I hate that theorem.


  • #117
    shadowninty
    Closed Accounts Posts: 3,654 ✭✭✭shadowninty


    I thought I had it learned but nooo. sigh


  • #118
    omg a kitty
    Closed Accounts Posts: 447 ✭✭omg a kitty


    Lol, I just skipped the theorems I dont understand where they come from so I didnt waste my time on them :o, good luck everyone, we'll all need it :(


  • #119
    TheRedDevil10
    Registered Users, Registered Users 2 Posts: 1,261 ✭✭✭TheRedDevil10


    ****tin it


  • #120
    cantanstrophe
    Registered Users, Registered Users 2 Posts: 144 ✭✭cantanstrophe


    I've been going through marking schemes, and as long as you get most of the questions right, then you can just get attempt marks for the theorem and it's grand. That's what I'll do :D


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  • #121
    buyer95
    Registered Users, Registered Users 2 Posts: 3,355 ✭✭✭buyer95


    Wow great paper! These paper 2s, im really starting to like. First Irish, which was legendary and now this. Delighted with that


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