Mathematics: Post your doubts here!

[lol]

Can anyone explain to me what lines of symmetry, planes of symmetry, and order of rotational symmetry is ? thank you and please help

 

[Zeerik]

I need Guide on Preparation Paper 4 Maths!

 

[lol]

may june 2010 paper 21 Question 10 ??

 

[bluefa1con]

Can anyone explain to me what lines of symmetry, planes of symmetry, and order of rotational symmetry is ? thank you and please help

lines of symmetry= lines that divide a shape in a way that both sides are equal and can over lap
plane of symmetry= a 3d plane that divide a shape into two identical shape
eg in a cuboid you can divide from center to make two cubes, you can divide from horizontal center to have 2 buboids
or you can divide from triangular center( a bit tricky to explain) to have 2 prisms
rotational symmetry= the number of times you can rotate a image to have the identical image
a square has 4 equal sides so it has 4 rotaional symmetry
rotational symmetry must be atleast one since u can rotate any image my 360 degree to have the same image
similarly a circle has infinite rotational symmetry

 

[Zeerik]

I need Guide on Preparation Paper 4 Maths!

 

[bluefa1con]

may june 2010 paper 21 Question 10 ??

you have 5 pieces of 3.5m long wood=17.5m
2 pieces of 1.5m long=3m
and a diagonal piece
use Pythagoras theorem for it *underroot*1.5sq + 3.5sq=3.81m
total= 17.5+3+3.81=24.31m
which rounds to 24.3 m correct to 3 sg figures

 

[lol]

you have 5 pieces of 3.5m long wood=17.5m
2 pieces of 1.5m long=3m
and a diagonal piece
use Pythagoras theorem for it *underroot*1.5sq + 3.5sq=3.81m
total= 17.5+3+3.81=24.31m
which rounds to 24.3 m correct to 3 sg figures

how did u know we have 5 lengths of wood and 2 pieces as width?

 

[bluefa1con]

how did u know we have 5 lengths of wood and 2 pieces as width?

look at the diagram they gave you
5 horizontal pieces
2 verticle pieces
and 1 diagonal piece

 

[lol]

look at the diagram they gave you
5 horizontal pieces
2 verticle pieces
and 1 diagonal piece

i still dont get it
please explain, ive attached a copy of the question, can u indicate on it to make it clear for me
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_qp_21.pdf

 

[slayer]

Can anyone please show me the constructions for Q18 on this paper http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s03_qp_2.pdf

 

[bluefa1con]

Can anyone please show me the constructions for Q18 on this paper http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s03_qp_2.pdf

 

[Aliya]

does anyone done yet paper2

 

[bluefa1con]

i still dont get it
please explain, ive attached a copy of the question, can u indicate on it to make it clear for me
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_qp_21.pdf

here i have marked on the diagram
red = 1.5
blue = 3.5
its just a matter of understanding the diagram

 

[IGCSE STUDENT]

yup i've seen a couple, but they wont be the long ones, just the direct ones or you'd just have to name what type it is with all its "features"

okay, thank you

 

[lol]

here i have marked on the diagram
red = 1.5
blue = 3.5
its just a matter of understanding the diagram

thankyou so much, i totally misinterpreted it

 

[bluefa1con]

thankyou so much, i totally misinterpreted it

best way to thank = gimmi more questions
you are welcome

 

[slayer]

Thank you! really appreciate it

 

[GetSomeLife]

nope manarat al khobar huh science on the same day :O my first science (physics) is nextteusday with ppr 4 for math

Hey! I live in khobar, too! Yeah, Math P42 and Physics P11 next tuesday

 

[bluefa1con]

Hey! I live in khobar, too! Yeah, Math P42 and Physics P11 next tuesday

its actually monday 14may

 

[GetSomeLife]

its actually monday 14may

Doesn't really matter tuesday monday... what's the difference? Nothing much can happen except for the fact that i may lose 2 freaking papers
and how do you know? which school?