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Junior Cert 2011 : Maths Paper 2

Cakes.

Monday 13th June 2011.
Afternoon 2:00-4:00/4:30

All discussion and questions about Paper 2 goes here.

Good luck everyone!

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her0fire

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

juniorcertlol

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

her0fire

juniorcertlol wrote: »

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

Colm!

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

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

shadowninty

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

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

Desire.

Just need a bit of clarification.

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

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

Colm!

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

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.

the marking sheme.)

her0fire

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

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!

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.

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

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!

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.

TheRedDevil10

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

joshissocool

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

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.

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.

Cakes.

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

shadowninty

Slow Show wrote: »

...I'm such a failure

Ah don't say that

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

Louise6

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

shadowninty

I thought I had it learned but nooo. sigh

omg a kitty

Lol, I just skipped the theorems I dont understand where they come from so I didnt waste my time on them

, good luck everyone, we'll all need it

TheRedDevil10

****tin it

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

buyer95

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