# Maths Question

Found 4th May 2010
I've been told to get the answer to this test any which way i can. So can you please help me with this one....

The question is:

ROTATE TRIANGLE 'R' A HALF TURN ABOUT THE POINT 'O' LABEL THE NEW TRIANGLE 'T'

Ta

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Original Poster

Steal the test paper :whistling:

Half a turn? Rotate it in which of the 3 dimensions?

Original Poster

pghstochaj;8526682

Half a turn? Rotate it in which of the 3 dimensions?

ive wrote down what was on the paper, nothing more, nothing less. If i had a shrug shoulders smiley i would use it now. People say tests are getting easier, this is a Grade D question!

Rotate the whole pic 180 degrees. Isn't that how the triangle should look?

:oops:

total guess...

Triangle will be at the -x -y quadrant after being rotated 180 at the 0,0 point (O).

Edit: Yeah what the man above said :p, generally it helps to understand the question BEFORE answering....This IS the key of life lol! It will save many lives and many hours of work.................

Banned

britain is going down the pan (obviously need to relabel)

stab a compass in the centre of the o. draw circles from all the points on the triangle. draw a line from each point of the triangle straight through the o. Where these points meet the circles you will have the new points for your new triangle. Not too good at explaining but you are basically rotating the triangle around the o by 180 degrees, the other marks are not important, me thinks anyway

I think point o needs to stay where it was just rotate around it

Banned

liverpool 0 - chelsea 2

good times

Banned

give the teacher 50 quid, or blackmail with lewd photo's

but im sure really, he expects you to do your homework
besides, I have no idea, and would bribe someone myself...

Original Poster

Despite not understanding still how this is the answer, ive now edited the first post, so im guessing that is the right answer?

Thanks guys :thumbsup:

Yes, that is correct(ish), it supposed to be closer to X, as others have shown.
Out of curiosity what yr/paper ru doing?

he is being sarcy. The easiest way to explain is with tracing paper, a pencil and a pin:
pin the tracing paper to the `o`, then trace the triangle.
Spin the paper untill the triangle is upside down, then draw the new triangle on the paper underneath.

Banned

Despite not understanding still how this is the answer, ive now edited … Despite not understanding still how this is the answer, ive now edited the first post, so im guessing that is the right answer?Thanks guys :thumbsup:

no that's not the right answer. all you need to do is rotate 180 degrees about the axis (origin).

you have added to y and minused from x and then rotated 180 about the axis

I think you should be able do draw a straight line through the o to its matching points????? should let you know if it's right by doing so.

The question has insufficient information, there are several answers. Maths should be rigorous.

, ive now edited the first post, so im guessing that is the right answer?

Is this a wind up?

Original Poster

Inquisitor;8526859

Yes, that is correct(ish), it supposed to be closer to X, as others have … Yes, that is correct(ish), it supposed to be closer to X, as others have shown.Out of curiosity what yr/paper ru doing?

GCSE Foundation paper from a few years back

Banned

do you go to a special school borolad?

bykergrove;8526868

no that's not the right answer. all you need to do is rotate 180 degrees … no that's not the right answer. all you need to do is rotate 180 degrees about the axis (origin). you have added to y and minused from x and then rotated 180 about the axis

That assumes that:

1) half a turn is 180 degrees; and

Original Poster

Inquisitor;8526859

Yes, that is correct(ish), it supposed to be closer to X, as others have … Yes, that is correct(ish), it supposed to be closer to X, as others have shown.Out of curiosity what yr/paper ru doing?

Yep, i was abit off, i have drawn it on the test paper closer to the Y axis.

grabbit;8526892

Yours appears to be mirror image,mine is correct

The world must look diferent in your mirrors :whistling:

Original Poster

bykergrove;8526900

do you go to a special school borolad?

Nope, believe it or not, but on my first GCSE test, (20% of the full GCSE) I was 1 mark of an A*

pghstochaj;8526905

That assumes that:1) half a turn is 180 degrees; and2) you are rotating … That assumes that:1) half a turn is 180 degrees; and2) you are rotating it about the axis of your choice.

1) I assume full turn is 360, half turn is 180.. when have you done a half turn and ended up not HALF way? (for a GCSE level paper).

2) Rotating at point O Assumed to be at 0,0. what axis would you like to pick? :thinking: considering its a 2d object with x, and y only........................

stop trying to overcomplicate things for the sake of it.

Original Poster

You've lost me, all of you :?

Banned

pghstochaj;8526905

That assumes that:1) half a turn is 180 degrees; and2) you are rotating … That assumes that:1) half a turn is 180 degrees; and2) you are rotating it about the axis of your choice.

2) it said point O which i understand (verifying this against the crude diagram) is trying to say origin (0,0)

is foundation GCSE maths not the MENSA entrance exam

Banned

Inquisitor;8526953

1) I assume full turn is 360, half turn is 180.. when have you done a … 1) I assume full turn is 360, half turn is 180.. when have you done a half turn and ended up not HALF way? (for a GCSE level paper).2) Rotating at point O Assumed to be at 0,0. what axis would you like to pick? :thinking: considering its a 2d object with x, and y only........................stop trying to overcomplicate things for the sake of it.

I like you :thumbsup: repped.

You've lost me, all of you :?

Ignore the confusion.. some people are trying to be too clever for their own good... :roll:

Edit:
bykergrove;8526972

I like you :thumbsup: repped.

Thanks lol, just find it annoying how much level of detail people get into for 'straight forward' things like these (straight forward in a sense of it has no catch, there is no secret thing to trip you up etc. you just need to understand the question. I do NOT mean easy in any way because different people interoperate things differently).

I could throw people fourier/lapace tranforms, Lagrangian equations, quaternions (whatever the spelling is) all day at things like 1/0 = Not 0 or 1, if it was required.. and how 0 is an undefined number etc etc etc..

Inquisitor;8526953

1) I assume full turn is 360, half turn is 180.. when have you done a … 1) I assume full turn is 360, half turn is 180.. when have you done a half turn and ended up not HALF way? (for a GCSE level paper).2) Rotating at point O Assumed to be at 0,0. what axis would you like to pick? :thinking: considering its a 2d object with x, and y only........................stop trying to overcomplicate things for the sake of it.

1) It should say 180deg to avoid all doubt, it should also state which direction, at minium clock wise or anti clockwise; and
2) It is not stated as 2 dimensional, nor does 0 look to be at 0,0 in the graphic.

Hence my point, the question is meaningless unless you make assumptions and that isn't what maths is about.

Inquisitor;8526978

Ignore the confusion.. some people are trying to be too clever for their … Ignore the confusion.. some people are trying to be too clever for their own good... :roll:

How can somebody be too clever for their own good?

the proper way to do it is with a compass and a protractor

It says to rotate it about o, not where axis x meets axis y. Some are assuming o is where x meets y. I'd go for the middle of the o if your teacher says it's wrong you can then explain why you have done it this way. Could make for a good argument

This way you are doing exactly as asked and not assuming anything.

Banned

pghstochaj;8527024

1) It should say 180deg to avoid all doubt, it should also state which … 1) It should say 180deg to avoid all doubt, it should also state which direction, at minium clock wise or anti clockwise; and2) It is not stated as 2 dimensional, nor does 0 look to be at 0,0 in the graphic.Hence my point, the question is meaningless unless you make assumptions and that isn't what maths is about.

1) if it's 180deg (sic) then what does it matter which way to turn?
2) look how thick the lines are, i agree they should have called it the origin instead of O but who knows what kids are taught these days... maybe they have been taught that the letter O signifies the origin? i doubt in foundation GCSE they would be asked to rotate around (0.5,-0.5)

Its shocking how many people ITT cant do a simple gcse maths question. Point o is not (0,0).

Burty;8527052

It says to rotate it about o, not where axis x meets axis y. Some are … It says to rotate it about o, not where axis x meets axis y. Some are assuming o is where x meets y. I'd go for the middle of the o if your teacher says it's wrong you can then explain why you have done it this way. Could make for a good argumentThis way you are doing exactly as asked and not assuming anything.

It says rotate about the point 0,the intersection is point 0

Don't try to complicate it,its a simple rotation question

pghstochaj;8527024

1) It should say 180deg to avoid all doubt, it should also state which … 1) It should say 180deg to avoid all doubt, it should also state which direction, at minium clock wise or anti clockwise; and2) It is not stated as 2 dimensional, nor does 0 look to be at 0,0 in the graphic.Hence my point, the question is meaningless unless you make assumptions and that isn't what maths is about.

Actually yes maths is about assumptions if it is not given. One would write, "assumed etc etc, therefore......." you dont just write "Not enough info given" because you will get 0 in marks and 0 in life.

Grabbit - I tried to not use the term simple (read my earlier post), as its a bit derogatory to some who may think otherwise.

bykergrove;8527102

1) if it's 180deg (sic) then what does it matter which way to turn?2) … 1) if it's 180deg (sic) then what does it matter which way to turn?2) look how thick the lines are, i agree they should have called it the origin instead of O but who knows what kids are taught these days... maybe they have been taught that the letter O signifies the origin? i doubt in foundation GCSE they would be asked to rotate around (0.5,-0.5)

What is sic about 180deg? Deg is an accepted abbreviation and it is not a unit, it does not need a space.

It matters to be rigorous, since although the answer is the same, it is actually different, it just looks the same. It's a shame they dumb it down but I suppose it is irrelevant at this level.

Inquisitor;8527193

Actually yes maths is about assumptions if it is not given. One would … Actually yes maths is about assumptions if it is not given. One would write, "assumed etc etc, therefore......."

That is a different type of assumption, the assumptions required to solve this question actually allow the person to create their own question - which is not the way it should be.

Y6 maths: bisect angles to find centre part. draw line from centre to"O"... use tracing paper.... mark point O, triangle and line from triangle to O... then rotate about point O 180 degrees.