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#76 Re: Maths Teaching Resources » for a challenge » 2006-07-12 10:07:45

RauLiTo

views : 16
replies : 0

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#77 Maths Teaching Resources » for a challenge » 2006-07-11 03:48:33

RauLiTo
Replies: 9

hello everybody ... in fact i dont know how to start rolleyes
as you all know i am an arabian person ... i decided to make a topic in an arabic forum about math '' enjoy the math '' and i need some questions , tricks , math magic ... to put there big_smile so i need your help lovely members !!! who can give me links ? who can put questions not difficult ones but cool and nice question which make you interested in math cool!!!

thanks again

#78 Re: Help Me ! » circle ? square ? or the rectangle ? » 2006-06-26 03:16:51

RauLiTo

thaaaaaaaaaaaanks thaaaaaaaaaanks ...∞ thanks alot darling !!! you are amazing !!! thanks again

#79 Re: Help Me ! » circle ? square ? or the rectangle ? » 2006-06-26 03:04:39

RauLiTo

woow brilliant ! ... just one thing :
xy < \frac{x^2 - y^2}{2}
how did it become :
\frac{xy}{2} < \frac{x^2 + y^2}{4}

i meant the - how did it become + ?!

sorry really sorry i bothered u alot !

#80 Re: Help Me ! » circle ? square ? or the rectangle ? » 2006-06-25 20:03:11

RauLiTo

s² = ( x² + 2xy + y² ) / 4 !

#81 Re: Help Me ! » circle ? square ? or the rectangle ? » 2006-06-25 10:07:50

RauLiTo

guys sorry but still didnt get it exactly
( XY + 4 (( X + y ) / 2 )) / 2 = ( X + y ) ² / 4 ... how is that ?
( X + Y ) ² = X² + 2 XY + Y ²

#82 Re: Help Me ! » circle ? square ? or the rectangle ? » 2006-06-24 22:42:56

RauLiTo

hehehe maybe i didnt learn that !
is there any other way to prove it ?

#83 Re: Help Me ! » circle ? square ? or the rectangle ? » 2006-06-24 21:49:05

RauLiTo

sorry dear MathsIsFun but i didnt understand that about minima and maxima sad

#84 Help Me ! » circle ? square ? or the rectangle ? » 2006-06-24 03:56:21

RauLiTo
Replies: 17

we have a retangle , a square and a circle ... they are all have got the same Perimeter ... the eustion is : which one has got the biggest area ?!
by putting numbers it like this :
1 - circle
2 - square
3 - rectangle

i proved that the circle has got an area bigger than the square like this :
4 X = 2 Pi radius >>> radius = 2X / Pi
therefore the area of the circle is : 4 X ² / Pi which is nearly = 1.27 X ²
the area of the square is = x ²
1.27 X ² > X ²

but now i want to prove that the rectangle has got smaller area than the quare ... who can help me ?rolleyes

#85 Re: Help Me ! » get the number » 2006-06-23 04:08:46

RauLiTo

brilliant PI MAN !!! u r really creative
thanks alot

#86 Re: Help Me ! » get the number » 2006-06-23 01:28:38

RauLiTo

sorry i forgot to say its less than 3000

#87 Help Me ! » get the number » 2006-06-23 01:25:52

RauLiTo
Replies: 5

get the number which is divdd by 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9 with a remain 1 !
i got the number its 5251 but the question how can we calculate that !?

#88 Re: Help Me ! » balls inside the pyramid » 2006-06-22 22:39:37

RauLiTo

you are right mathisfun big_smile ... thanks for saying that
yah raulito is a hispanic name tongue my real name is yousif '' arabic one '' mu username is raulito because i lo e raul gonzalez

math properly is the right way to think you are right

#89 Re: Help Me ! » balls inside the pyramid » 2006-06-22 20:51:17

RauLiTo

umm ... okay i'll explain how did i say 9 balls
64 cm ^ 2 >>> 8 * 8
we cant use the hight because 3 cm is not enough for a ball ! ... the diameter is 2 !
if we calculate it we will get that we can put 4 balls in the 8 cm ! but in fact we cant do that because the pyramid has got a problem in the corner we cant put 4 fit ! so lets say 3
3 * 3 = 9

sorry guys my english is not that much ... my language is arabic


thanks for help ... try more ... i need a certain answer
where is ganesh big_smile ? help us with it

#90 Re: Help Me ! » balls inside the pyramid » 2006-06-22 07:00:04

RauLiTo

anyone here ?

#91 Help Me ! » balls inside the pyramid » 2006-06-20 10:52:45

RauLiTo
Replies: 18

we have a pyramid which has got a base with area of 64 cm ²  and a high 3 cm ... we want to put inside it balls with 1 cm radius . how many balls can we put inside it ?

my answer : 9 balls
can i see your answers please ?

#92 Help Me ! » the biggest circumference !? » 2006-06-08 20:08:45

RauLiTo
Replies: 4

a triangle and a square and a circle have got the same area which one has got the biggest circumference ?

i think the triangle ... can i see your solution for that ?! rolleyes

#93 Re: Help Me ! » ... equation ... » 2006-05-31 23:55:58

RauLiTo

no solution = anything expect the zero

#94 Re: Help Me ! » ... equation ... » 2006-05-31 21:22:13

RauLiTo

i don't think so !!!
we cant divide be zero !!! its unknown

#95 Help Me ! » ... equation ... » 2006-05-31 21:03:59

RauLiTo
Replies: 25

hi guys ... how are you all ?

well ...  my friend said that there is a solution for the equation :
3 / X = 4 / X ... i told him immediately thats impossible
whats ur opinion ? and if not why ?!:cool:

#96 Help Me ! » trigonometry » 2006-05-08 23:10:14

RauLiTo
Replies: 2

A and B are two acute angles. Prove that if
sin² (A) + sin² (B) = sin( A + B ), then
A + B  = 180/2.

waiting for your help smile

#97 Re: Help Me ! » X2x2 » 2006-04-30 03:13:04

RauLiTo

how do they solve it ?

#98 Help Me ! » X2x2 » 2006-04-30 01:51:51

RauLiTo
Replies: 9

i am a student in my second year in a secondry school maybe i didn't learn how to solve this type of equation or maybe i don't know how ... my friend asked me to solve it ... who can solve it please?

X ^ 2 = 2 ^ X

thanks

#99 Re: Help Me ! » in the circle » 2006-04-09 18:20:18

RauLiTo

thanks man wink

#100 Re: Help Me ! » in the circle » 2006-04-09 07:47:13

RauLiTo

excuse me can you finish it please ?
it sometimes seems difficult for me to translate that to arabic u know ... sorry everybody for botering cool

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