Maths, Addmaths and Statistics: Post your doubts here!

[***amd***]

View attachment 43560
Part c, please? :/

Answer is 20 < @ < 80 ?

 

[Faizan Muhammmad]

But how do we know this?

ship nay beech main say guzrna hai , PB , PL extremes hogayein
so possible angle bhee PB say lay k PL tak hoga

 

[funky brat]

Answer is 20 < @ < 80 ?

25 (and) 48 or 29 and 48

 

[funky brat]

ship nay beech main say guzrna hai , PB , PL extremes hogayein
so possible angle bhee PB say lay k PL tak hoga

 

[Faizan Muhammmad]

View attachment 43561
Any help with such questions?

yeah we did them in junior classes with a simple method
draw the lines, then imagine them as mirrors and keep copying shaded boxes on all sides

 

[funky brat]

yeah we did them in junior classes with a simple method
draw the lines, then imagine them as mirrors and keep copying shaded boxes on all sides

How to decide where to draw the line?

 

[***amd***]

25 (and) 48 or 29 and 48

lol, ok i just measured it on screen

 

[Faizan Muhammmad]

-_- what?

 

[***amd***]

But how do we know this?

no help, sirf dimagh kaam aata hai.

 

[funky brat]

-_- what?

Nothing. .-.

 

[Faizan Muhammmad]

How to decide where to draw the line?

in the middle genius
take any for single line of symmetry
and two lines for double

 

[funky brat]

in the middle genius
take any for single line of symmetry
and two lines for double

Yeh 'any' kya hai?
You mean agar wo one line of symmetry kahen to centre main line draw karun agar 2 LOS kahen to 2?
What's the difference between line of symmetry and order of rotational symmtery?

 

[Faizan Muhammmad]

Yeh 'any' kya hai?
You mean agar wo one line of symmetry kahen to centre main line draw karun agar 2 LOS kahen to 2?
What's the difference between line of symmetry and order of rotational symmtery?

any means take it from top to bottom, right to left, or the two diagonals
yeah for 2 LOS we make 2 lines, making 4 regions which should mirror each other
line of symmetry is the line which divides int two similar parts, rotational is the number of time the image will fit on itself if fully rotated

 

[funky brat]

any means take it from top to bottom, right to left, or the two diagonals
yeah for 2 LOS we make 2 lines, making 4 regions which should mirror each other
line of symmetry is the line which divides int two similar parts, rotational is the number of time the image will fit on itself if fully rotated

Hmm thanks.

 

[asadalam]

Imo,maths cant be explained easily in words,and no matter how much i try,i cant seem to explain :/

 

[Mahnoorfatima]

http://papers.xtremepapers.com/CIE/...Calculator Version) (4024)/4024_w13_qp_12.pdf
In question 25 part c my answers 15... Whereas the method is fine! And it should be 45 but it's not.
150+(300-20k)=750
Can anyone tell me what's wrong in it? Please?

 

[Faizan Muhammmad]

Take tracing paper. Draw the square outline and mark the already colored boxes in respective places and mark 2 boxes which you think will make the rotational symmetry order 2. Rotate the tracing paper and try to see if it is of order 2.

Thats how I will do them if any come in the paper.

wow
just one problem....

exam main tracing paper asmaan say ayega??

 

[funky brat]

Take tracing paper. Draw the square outline and mark the already colored boxes in respective places and mark 2 boxes which you think will make the rotational symmetry order 2. Rotate the tracing paper and try to see if it is of order 2.

Thats how I will do them if any come in the paper.

You would take tracing paper along? Is that allowed?

 

[Faizan Muhammmad]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w13_qp_12.pdf
In question 25 part c my answers 15... Whereas the method is fine! And it should be 45 but it's not.
150+(300-20k)=750
Can anyone tell me what's wrong in it? Please?

can you posts screnshots?
its tough to go finding questions

 

[Mahnoorfatima]

can you posts screnshots?
its tough to go finding questions

I would but if I knew how to. :/ I don't know how am I supposed to do that on my iPad.