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ElectroDream
11-06-2015, 12:48 PM
(WARNING: TOTALLY NOT AN ORIGINAL THREAD.) Credits to Ceyx.

Mmkay, I love solving math problems but today, I want math questions related to Circle. (Its area, its circumference, its arc and its section/segment's area. That's the ones I can solve. :rolleyes:)

I also love the ones with another shape, like for example, a square in a circle, calculate the shaded area, etc.

ONLY POST IF YOU KNOW THE ANSWER!

Go ahead, if you wanna.

Clincher
11-06-2015, 12:54 PM
Can you count me in? I'm interest too :crazy:

Kraggle
11-06-2015, 12:54 PM
What's 9 + 10?

GummiBear64
11-06-2015, 12:55 PM
If a circle has the same length base of a triangle, same height of a square and same depth of a rectangle, what month of the year will the Australia Day AFL match occur in America if the sun's trajectory is placed correctly?

Please, write all working out.

SpeedFreakz
11-06-2015, 12:56 PM
1. y = (2x + 3)(x - 1)(x - 4) =
2. y = -x³ + 2x² + 11x - 2 =
3. y = x⁴ - 26x² + 25 =
4. y = -x⁴ -5x³ + 3x² + 13x - 10 =
5. y = x²(x + 3)(x + 1)⁴(x - 1)³ =

Answer it...

At your own RISK...

99125
11-06-2015, 12:58 PM
How many sides does a circle have?

GummiBear64
11-06-2015, 12:59 PM
How many sides does a circle have?

What sort of circle are we talking? Square circle, triangular circle?
There is many answers.

Clincher
11-06-2015, 01:00 PM
1. y = (2x + 3)(x - 1)(x - 4) =
2. y = -x³ + 2x² + 11x - 2 =
3. y = x⁴ - 26x² + 25 =
4. y = -x⁴ -5x³ + 3x² + 13x - 10 =
5. y = x²(x + 3)(x + 1)⁴(x - 1)³ =

Answer it...

At your own RISK...

do you even know what you are asking?

SpeedFreakz
11-06-2015, 01:01 PM
do you even know what you are asking?

I'm asking her to answer all the question...

You can answer that if you want. :whistling:

GummiBear64
11-06-2015, 01:01 PM
do you even know what you are asking?

That's fairly basic algebra.

Unless I'm being deceived and the answer to question 1 ends up being like 6283x + 8282y - 2828z * 737h^5

Indicative
11-06-2015, 01:01 PM
What's the area of a circle with radius 301cm? (Answer in kilometers)

ElectroDream
11-06-2015, 01:07 PM
What's the area of a circle with radius 301cm? (Answer in kilometers)

Finally, a serious question.

301 x 301 x 22/7

301 x 43 x 22

284,746 cm2

= 0.0000284746 km2

99125
11-06-2015, 01:09 PM
What sort of circle are we talking? Square circle, triangular circle?
There is many answers.

It was a riddle, but you took it too seriously...

Btw the answer is 2. Inside and outside.

- - - Updated - - -


Finally, a serious question.

301 x 301 x 22/7

301 x 43 x 22

284,746 cm2

= 0.0000284746 km2

Pi =/= 22/7
*grabs popcorn*

Colons
11-06-2015, 01:10 PM
Let the point EE be the midpoint of the line segment ADAD on the square ABCDABCD. Then let a circle be determined by the points EE, BB and CC as shown on the diagram. Which of the geometric figures has the greater perimeter, the square or the circle?

99431

ElectroDream
11-06-2015, 01:12 PM
1. y = (2x + 3)(x - 1)(x - 4) =
2. y = -x³ + 2x² + 11x - 2 =
3. y = x⁴ - 26x² + 25 =
4. y = -x⁴ -5x³ + 3x² + 13x - 10 =
5. y = x²(x + 3)(x + 1)⁴(x - 1)³ =

Answer it...

At your own RISK...

What are you asking? Because I don't get it (and I don't think anyone does), i'll make the Y zero, so I'm factorizing those equations.

1. y = x (2+3)(1-1)(1-4)
y = x (5)(0)(-3)
y = -3x.
What kind of question is this even? ._.

2. y = -x³ + 2x² + 11x - 2 =
y = x (-x2 + 2x + 11-2)
x = 0

-x2 + 2x + 9
Nope, there's none.

I'm done doing your ridiculous questions. ._.

- - - Updated - - -


Let the point EE be the midpoint of the line segment ADAD on the square ABCDABCD. Then let a circle be determined by the points EE, BB and CC as shown on the diagram. Which of the geometric figures has the greater perimeter, the square or the circle?

99431

the circle.

Colons
11-06-2015, 01:13 PM
99434

As you can see, there are four circles. Each of them has a radius of 1 meter. They are arranged so they are tangent to two others and their centers form the corners of a square.
A smaller circle is inscribed in the space bounded by the four blue circles - so this smaller circle is tangent to each of the other four circles.
What is it's radius?

ElectroDream
11-06-2015, 01:14 PM
Pi =/= 22/7
*grabs popcorn*

In my school, it's allowed. I know it's not allowed in most schools because it exceeds pi, but if I calculate using 3.14 it would be nearly the same and if I round it off, it would be the same.

Colons
11-06-2015, 01:14 PM
What's 9 + 10?

21 !!!!!!!!!

Clincher
11-06-2015, 01:21 PM
99434

As you can see, there are four circles. Each of them has a radius of 1 meter. They are arranged so they are tangent to two others and their centers form the corners of a square.
A smaller circle is inscribed in the space bounded by the four blue circles - so this smaller circle is tangent to each of the other four circles.
What is it's radius?

the bigger circle has radius 1m that makes triangle between 3 circle with the hypotenuse 2root2
with the smaller one in the middle will have diameter = 2root2 - 2
which makes the radius will be half of it = root2 - 1

PIC will be shown as soon as I can ;)

http://i.imgur.com/7tqarzv.jpg

ElectroDream
11-06-2015, 01:26 PM
99434

As you can see, there are four circles. Each of them has a radius of 1 meter. They are arranged so they are tangent to two others and their centers form the corners of a square.
A smaller circle is inscribed in the space bounded by the four blue circles - so this smaller circle is tangent to each of the other four circles.
What is it's radius?

This is a hard one, thanks, my brain can finally get to work. :hat:

I'll change it all in terms of cm.

100 x 100 x 314/100
31,400 cm2

Don't judge how I came up with this ridiculous method beyond this line.


the square's side = 400 cm
400 x 4 = 1600 cm

400 x 400 = 160000 cm2
200 x 400 = 80,000 cm2

Ok, it's harder than I thought.

My brain isn't working. @-@ I know that i'll have to find the segment (or it is sector? Gosh, I'm bad at remembering names) area (pretty much) and its chord's length.

Wait, let me proceed.

90 degrees segment

wait

circumference of circle = 200 x 314/100 = 628 cm

628:4 = 157 cm

157

radius of circle = 100 cm

10000 + 10000 = c2
c = 20000 square root (too lazy to find the symbol, kek.)
141 / 119

ok fine i give up

heading to bed now. :crazy:
brain's too tired. thanks for the question tho' - I wouldn't be sleeping if it wasn't there. :rolleyes:

Colons
11-06-2015, 01:43 PM
I got another one for you. This one is not by me, it's a bit tricky.

99438

A circle is inscribed within a square. A smaller square is inscribed within this circle. What is the ratio of the area of the larger square to that of the smaller square?

:3

Clincher
11-06-2015, 01:46 PM
This is a hard one, thanks, my brain can finally get to work. :hat:

I'll change it all in terms of cm.

100 x 100 x 314/100
31,400 cm2

Don't judge how I came up with this ridiculous method beyond this line.


the square's side = 400 cm
400 x 4 = 1600 cm

400 x 400 = 160000 cm2
200 x 400 = 80,000 cm2

Ok, it's harder than I thought.

My brain isn't working. @-@ I know that i'll have to find the segment (or it is sector? Gosh, I'm bad at remembering names) area (pretty much) and its chord's length.

Wait, let me proceed.

90 degrees segment

wait

circumference of circle = 200 x 314/100 = 628 cm

628:4 = 157 cm

157

radius of circle = 100 cm

10000 + 10000 = c2
c = 20000 square root (too lazy to find the symbol, kek.)
141 / 119

ok fine i give up

heading to bed now. :crazy:
brain's too tired. thanks for the question tho' - I wouldn't be sleeping if it wasn't there. :rolleyes:

I solved it lol
just asking in what grade r u? Ur Indonesian right?

ElectroDream
11-06-2015, 02:27 PM
I solved it lol
just asking in what grade r u? Ur Indonesian right?

9th grader and yes I am.

I'm soooo bad at this. :crazy::crazy::crazy::crazy:

Ceyx_GrowT
11-06-2015, 02:42 PM
You gotta pay 99 DLs for copying my thread's idea.

Berzox
11-06-2015, 03:04 PM
One a scale of blue to triangle how round is a circle with stripes?

GummiBear64
11-06-2015, 10:07 PM
It was a riddle, but you took it too seriously...

Btw the answer is 2. Inside and outside.

- - - Updated - - -



Pi =/= 22/7
*grabs popcorn*

I never take anything seriously, lmao.

smartsmile
11-06-2015, 11:18 PM
99475

ik it's unrelated but triangle is not to scale :p

find x

Clarken (ciarken)
11-06-2015, 11:19 PM
Why do people like math? I'm actually really good at but I still hate it.