Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

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## #1 Re: Introductions » Hi to everyone » 2010-07-05 18:00:00

I watched voyager all seven seasons in two weeks :-). It was amazing.
I never thought that it would be better than next generation. Next,  I will  watch deep space 9 than stargate buttttttttttttt .......one minute.......let me finish my exam first.
amazing forum.... people here are nicer than many math teachers.......

## #2 Re: Introductions » Square problem: » 2010-07-01 03:30:54

how to solve this problem. please explain!

## #3 Introductions » Square problem: » 2010-06-30 15:50:19

lakeheadca
Replies: 3

ABCD is a square with area 9. efgc is a square in which EC=1/3(BC). HIJC is s square in which HC=1/3(EC). If this pattern is continued so that there are a total of ten squares with common vertex at C. and in which each square lies inside its predecessor, what is the area of the tenth square?
Answer: 9^-8

## #4 Introductions » Factors » 2010-06-30 15:41:18

lakeheadca
Replies: 1

Exclusive of the numbers 1 and 1176, how many factors are there for the number 1176.
a.20
b. 22
c.24
d. 26
is there any trick to solve?

## #5 Introductions » Triangle ratio and midpoint » 2010-06-30 15:37:37

lakeheadca
Replies: 1

in the fig, triangle PQR ~ TUV. point S is the midpoint of QR AND POINT W is the midpoint of UV. If PR/TV = 3/5 WHAT IS THE VALUE OF THE FOLLOWING ratio?
Area of triangle PSR / Area of triangle TUV.
note:Large fig is not 90 degree, not to scale

## #6 Introductions » Transformation » 2010-06-30 15:33:48

lakeheadca
Replies: 1

The Transformation T of triangle ABC to ABC is a dilation with center at o. if the area of  ABC is twice the area of ABC what is the scale factor of T.

## #7 Re: Introductions » Problem#3 Grade 11 Geometry » 2010-06-30 15:31:01

Thank you Bobby. I got it. You made the problem easy.

## #8 Re: Introductions » Problem#3 Grade 11 Geometry » 2010-06-29 03:34:47

I think first time you guys came across someone who is that bad in Math

## #9 Re: Introductions » Problem#3 Grade 11 Geometry » 2010-06-29 03:29:09

ZHERO:
ADC∼CDB (One triangle looks bigger than other one????) they don't looks equal. Are you saying something about ratio

Bobby:
what is a² and what is h²
if (10-x) is AD
so DB should be 10+x or the same 10-x ???

lost again. hate Pythagorean.

## #10 Re: Introductions » Geometry: grade 11 problem#4 » 2010-06-29 03:11:41

Thank you guys,
but I really have no Idea what ZHERO did? HOW you come with
10² + x² = (6 + √(x² - 4²))² ?????????????

Bobby
4^2 + 6^2 = c^2 = 52 (c should be 10)
4^2 + x^2 = s^2  (4 + x^2 = s^2 <--- should be this)??
I know, I ask so many questions, sorry my teachers told me too.
I hate this question. Help me, Please,

## #11 Re: Introductions » Problem#3 Grade 11 Geometry » 2010-06-24 17:20:21

6²+8²=c²
100=c²
10=c
10x=6²
X=3.6 Ans.
But Why 10x Multiplying With X???

## #12 Introductions » Geometry: grade 11 problem#4 » 2010-06-24 17:17:56

lakeheadca
Replies: 4

BD=4
DC = 6
find AC

EXPLAIN PLEASE.THANKS

## #13 Introductions » Problem#3 Grade 11 Geometry » 2010-06-24 17:04:54

lakeheadca
Replies: 15

What Is The Length Of Ad To The Nearest Tenth Of A Centimeter?
1)3.6
2)6.0
3)6.4
4)4.0
Please Explain. Thank You.

## #14 Introductions » Problem#2 Grade 11 Geometry » 2010-06-24 17:02:35

lakeheadca
Replies: 1

in the diagram of triangle ABC and EDC below, AE and BD intersect at C, and angle
CAB approx= CED
which method can be used to show that triangle ABC must be similar to Triangle EDC.
1. SAS
2.SSS
3.AA
4.HL
please explain? thanks

## #15 Introductions » Geometry: grade 11 problem#1 » 2010-06-24 16:59:24

lakeheadca
Replies: 1

Give triangle ABC and EDC, c is the midpoint of
__        __
BD and AE.

prove: AB|| DE

## #16 Re: Introductions » Find Sphere Volume » 2010-06-21 17:16:23

!!!Where did you learn this stuff!!!
you guys know almost everything in math.
********** thank you bobby***********
I have two questions which I asked couple of math teachers but couldn't get the answers (even reply:). I know you can solve those problems. I will write and try to ask you later, as soon as my computer work properly. I think they  involve Numerical Approximation and differentiation.

## #17 Introductions » Find Sphere Volume » 2010-06-20 07:00:35

lakeheadca
Replies: 4

A sphere is inside a cube. What is volume of sphere?
I don't remember exactly what was the question, perhaps they gave the volume of cube i.e: 100³.
thank you

Amazing !!!
(Thanks * 1000)

## #19 Re: Guestbook » Create an equation » 2010-06-19 03:58:52

Please can you explain that actually what this question is asking.  What this equation will do. I still don't know how to come up the equation. Am I finding length which is equal to this function. It is quadratic equation, so there are two W??
I am not good in math. Sorry.

## #20 Introductions » Find diameter » 2010-06-19 03:49:58

lakeheadca
Replies: 3

how to find the diameter of the given figure.
thank you so much guys, specially bobby who always help so fast. He is great.

## #21 Re: Guestbook » Function Question » 2010-06-19 03:40:35

you are a great help. very nice way to solve ... you made this problem amazingly simple.
Thank you,

## #22 Re: Guestbook » Function Question » 2010-06-18 14:15:12

Thank you Bobby,
Please can you show me how to solve it.

## #23 Re: Guestbook » distance problem » 2010-06-18 12:38:47

this question was in my math licensing exam.

## #24 Re: Guestbook » distance problem » 2010-06-18 11:29:37

There is no more information in the question, just one fig

## #25 Guestbook » Create an equation » 2010-06-18 11:02:05

lakeheadca
Replies: 3

A rectangle or square with perimeter 100cm, area 25 cm² what will be the equation.
is it
w²+25w+100
w²+50w+25
w²+25w-100
the third option i dont remember.
Please explaine
thank you.

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