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Maths Paper 2 HL

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  • 06-06-2008 5:11pm
    #1
    hardcorev1bes
    Closed Accounts Posts: 28 ✭


    Maths Paper 2 Monday..are yee are ready for it?
    and does anyone know what theorems MIGHT come up this year?


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    #2
    john concannon
    Closed Accounts Posts: 474 ✭✭john concannon


    Haven't a clue.I probably will go down to pass for leaving.I did alright in paper 1 (60%) in that paper.I suck at paper 2.Good luck to everybody though.


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    #3
    conormurphy
    Closed Accounts Posts: 228 ✭✭conormurphy


    My teacher guaranteed us that it be either 3,5,6 or 8 this year ;)


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    #4
    hardcorev1bes
    Closed Accounts Posts: 28 ✭hardcorev1bes


    ah sweet ..thanks man :D


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    #5
    echoindia756
    Banned (with Prison Access) Posts: 58 ✭✭echoindia756


    conormurphy wrote: »
    My teacher guaranteed us that it be either 3,5,6 or 8 this year ;)

    You said 3,4,6 and 8 yesterday!


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    #6
    ircoha
    Closed Accounts Posts: 2,290 ✭✭✭ircoha


    Any advice from the teachers?


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    #7
    aingel
    Closed Accounts Posts: 31 ✭aingel


    what are 3 ,4 6 and 8. my teacher didnt give them any numbers?!


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    #8
    hardcorev1bes
    Closed Accounts Posts: 28 ✭hardcorev1bes


    is it 3 , 5 , 6 and 8 .......or 3, 4 ,6 and 8 that your teacher said would come up?


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    #9
    conorod
    Registered Users Posts: 75 ✭✭conorod


    aingel: the theorems are:

    1. Vertically opposite angles are equal in measure.
    2. The measures of the three angles in a triangle sum to 180.
    3. An exterior angle of a triangle equals the sum of the two interior opposite angles in measure.
    4. If two sides of a triangle are equal in measure, then the angles opposite these sides are equal in measure.
    5. Opposite sides and opposite angles of a parallelogram are respectively equal in measure.
    6. A giagonal bisects the area of a parallelogram.
    7. The measure of the angle at the centre of a circle is twice the measure of the angle at the circumference, standing on the same arc.
    8. A line through the centre of a circle perpendicular to a chord bisects the chord.
    9. If two triangles are equiangular, the lengths of the corresponding sides are in proportion.
    10. In a right-angled triangle, the square of the length of the side opposite to the right angle is equal to the sum of the squares of the length of the other two sides.


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    #10
    hardcorev1bes
    Closed Accounts Posts: 28 ✭hardcorev1bes


    ^^ thank you! :D:D


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    #11
    Calorimeterman
    Closed Accounts Posts: 64 ✭✭Calorimeterman


    Maths paper one was easy enuff at first and flew thru 1 and to apart from 1(c)(ii) but then i crashed and burned going into the rest :S
    Got the graph though and the things i was hoping wud come up didnt :S eg indices sets :S
    anyway im gunna have 2 study hard for paper two if i want a b or c :S
    i find paper 2 hard aswell btw and im more worried about the graphing formulas eg slope and stuff than the theorums :S
    Id say good luck but luck has nothing to do with it so ill say "hope ur study pays off" :P


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    #12
    ch252
    Closed Accounts Posts: 668 ✭✭✭ch252


    conorod wrote: »
    2. The measures of the three angles in a triangle sum to 180.
    Don't know why nobody said this one yet, I don't think it ever cam up and the course is changing VERY soon-they're making the bloody thing easer when we are done with it!


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    #13
    Lorthas
    Closed Accounts Posts: 41 ✭Lorthas


    darragh-k wrote: »
    Don't know why nobody said this one yet, I don't think it ever cam up and the course is changing VERY soon-they're making the bloody thing easer when we are done with it!
    I don't wanna sound pretentious, but I like the level of difficulty that it is now.... from what I've heard, maths gets alot more difficult going into leaving cert, so if you've got a big gap in difficulty levels between the junior and leaving cert, its just gonna cause more problems


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    #14
    Reckle
    Closed Accounts Posts: 34 ✭Reckle


    darragh-k wrote: »
    Don't know why nobody said this one yet, I don't think it ever cam up and the course is changing VERY soon-they're making the bloody thing easer when we are done with it!

    that 3 angles add up to 180 theorem came up on my mocks thank god because twas the only one i knew


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    #15
    ircoha
    Closed Accounts Posts: 2,290 ✭✭✭ircoha


    conorod wrote: »
    aingel: the theorems are:

    1. Vertically opposite angles are equal in measure.
    2. The measures of the three angles in a triangle sum to 180.
    3. An exterior angle of a triangle equals the sum of the two interior opposite angles in measure.
    4. If two sides of a triangle are equal in measure, then the angles opposite these sides are equal in measure.
    5. Opposite sides and opposite angles of a parallelogram are respectively equal in measure.
    6. A diagonal bisects the area of a parallelogram.
    7. The measure of the angle at the centre of a circle is twice the measure of the angle at the circumference, standing on the same arc.
    8. A line through the centre of a circle perpendicular to a chord bisects the chord.
    9. If two triangles are equiangular, the lengths of the corresponding sides are in proportion.
    10. In a right-angled triangle, the square of the length of the side opposite to the right angle is equal to the sum of the squares of the length of the other two sides.

    Nice piece of work here. I just corrected the spelling of diagonal in 6.

    Just wondering what's the preferred proof for 10?

    also what wording do u have for 9 about the line that is // to one side ....


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    #16
    ch252
    Closed Accounts Posts: 668 ✭✭✭ch252


    Lorthas wrote: »
    I don't wanna sound pretentious, but I like the level of difficulty that it is now.... from what I've heard, maths gets alot more difficult going into leaving cert, so if you've got a big gap in difficulty levels between the junior and leaving cert, its just gonna cause more problems

    Ya, there is that side of it too I guess.


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    #17
    conormurphy
    Closed Accounts Posts: 228 ✭✭conormurphy


    echoindia756 wrote: »
    You said 3,4,6 and 8 yesterday!

    Sorry you're right! But just take a look at the past papers and youll realise they probably will be the ones that come up! :)


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    #18
    t-mobile1892
    Closed Accounts Posts: 41 ✭t-mobile1892


    Our teacher didnt even cover the pythagoras or isosceles trianglle or parrallelogram theorems cos hes CONVINCED they wont come up :rolleyes: but i reckon some theorem about the circle will come up.... im studyin hard 4 paper 2 cos i messed up paper 1 nd i need agood grade in maths 4 the subjects im doin nxt year...:(


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    #19
    RMD
    Registered Users Posts: 2,662 ✭✭✭RMD


    hopefully it will be like the past years. I was looking at my exam papers yesterday and could answer everything I saw without help. Don't see why people think it's so hard, seems easy enough to me;)


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    #20
    eVeNtInE
    Registered Users Posts: 7,020 ✭✭✭eVeNtInE


    This post has been deleted.


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    #21
    tracker-man
    Closed Accounts Posts: 709 ✭✭✭tracker-man


    main thing i'm worried bout is the theorams. Other than that it should be do-able :D


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    #22
    jc2008
    Registered Users Posts: 246 ✭✭jc2008


    The preferred proof for 10 is drawing a large square of (a+b)^2 with four right angled triangles (abc)

    Doing this makes a smaller square, which is made up of four hypotenuses and is called c^2

    So (a+b)^2 - 4(.5ab) = c^2
    Therefore a^2 + b^2 = c^2

    This is what the diagram would look like
    http://upload.wikimedia.org/wikipedia/commons/2/26/Pythagproof.svg
    Pythagproof.svg


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    #23
    eVeNtInE
    Registered Users Posts: 7,020 ✭✭✭eVeNtInE


    This post has been deleted.


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    #24
    tracker-man
    Closed Accounts Posts: 709 ✭✭✭tracker-man


    by unit circle you mean the circle split into quarters with sin cos tan and all in it? If thats what your on about i.ve a weird but useful way to remember it!


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    #25
    eVeNtInE
    Registered Users Posts: 7,020 ✭✭✭eVeNtInE


    This post has been deleted.


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    #26
    lolipops
    Closed Accounts Posts: 113 ✭✭lolipops


    A friend of mine's teacher garunteed them that the pythagora's theorem was coming up.. i wonder if they have someone on the inside :rolleyes:

    which is the preffered way to proof it?
    i wasnt sure, we did both, the one with the three triangles and the one with the square in the centre.. i dont understand either so its not like it matters anyway!


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    #27
    tracker-man
    Closed Accounts Posts: 709 ✭✭✭tracker-man


    Mr Crystal wrote: »
    Yep! Iv totally forgotten everything about it and the revise wise is no help!

    I just start in the top right quarter and go clockwise All Coconuts Turn Sour. So in the top right corner all are positive, in the next one cos is positive, the next tan is positive and the last sin is positive! Its easy enough then to say 180 minus or 180 plus.

    Posted via Mobile Device


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    #28
    t-mobile1892
    Closed Accounts Posts: 41 ✭t-mobile1892


    lolipops wrote: »
    A friend of mine's teacher garunteed them that the pythagora's theorem was coming up.. i wonder if they have someone on the inside :rolleyes:

    which is the preffered way to proof it?
    i wasnt sure, we did both, the one with the three triangles and the one with the square in the centre.. i dont understand either so its not like it matters anyway!

    Our class didnt even cover that theorem cos our teacher is CONVINCED it wont come up....:rolleyes:


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