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Mathematics 9 Online
L2doll:

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L2doll:

Find the perimeter of a quadrilateral with vertices at C (−2, 1), D (2, 4), E (5, 0), and F (1, −3). a 12 units b 16 units c 20 units d 24 units

L2doll:

I chose C but i don't know if that correct

GalaxyzStarz:

Let's see.

L2doll:

see what?

GalaxyzStarz:

@l2doll wrote:
see what?
I'm creating a graph currently.

L2doll:

ok

GalaxyzStarz:

I have to write a lot, so please stay with me.

L2doll:

ok

L2doll:

woww he left

L2doll:

that's crazy

L2doll:

o he is back

Prettykitty89:

soldier just say you don't know the answer

GalaxyzStarz:

\[\frac{ }{ AB }=\sqrt{(4^2+3^2)}=\frac{ }{ AB }=\sqrt{16+9}\] \[\frac{ }{ AB }=\sqrt{25}\] \[\frac{ }{ AB }=5\] \[\frac{ }{ BC }=5\] \[\frac{ }{ CD }=5\] \[\frac{ }{ DA }=5\] So in which means since it's a quadrilateral, it has all equal sides. \[5+5+5+5=20\] So that will give you an answer of 20.

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L2doll:

oooo so i was correct

GalaxyzStarz:

@l2doll wrote:
oooo so i was correct
Good Job! :)

L2doll:

thank you sooo muchhhhh

L2doll:

LAST ONE I PROMISE

Cyber:

I'm just going to say that is super advanced math for such a simple problem but I'm not going to say anything

L2doll:

LAST ONE?

GalaxyzStarz:

@l2doll wrote:
LAST ONE?
Yeah, completely fine.

L2doll:

OK

L2doll:

Question 11 (1 point) (05.01 LC) Use the image below to answer the following question: A right triangle is shown. The two angles that are not 90 degrees are marked x and y. The leg across from angle y measuring 9, another leg across from angle x measuring 12, and the hypotenuse measuring 15. What relationship do the ratios of sin y° and cos x° share? a The ratios are both identical. (9 over 15 and 9 over 15) b The ratios are opposites. (negative 9 over 15 and 9 over 15) c The ratios are reciprocals. (9 over 15 and 15 over 9) d The ratios are both negative. (negative 15 over 9 and negative 9 over 15)

GalaxyzStarz:

Do you have an image?

L2doll:

umm yea hold on

L2doll:

here

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GalaxyzStarz:

Are you familiar with SOHCAHTOA?

L2doll:

YES!

L2doll:

what about it

GalaxyzStarz:

Do you know the sin of an angle?

L2doll:

opposite hypotenuse

L2doll:

right

GalaxyzStarz:

the sin of an angle is the side opposite the angle over the hypotenuse. Correct.

GalaxyzStarz:

Because the sides have lengths in integers, you will have a fraction representing the side opposite/hypotenuse.

L2doll:

ok

L2doll:

@galaxyzstarz

GalaxyzStarz:

What is the side length opposite the x?

L2doll:

12

L2doll:

Sooo/....

GalaxyzStarz:

The side adjacent to the angle y is the side that is 5. And the hypotenuse is 13. So the cos of angle y = 5/13. What did we say the sin of angle x was?

L2doll:

2.6?

L2doll:

well i said 12

GalaxyzStarz:

In a fraction form.

L2doll:

oh

L2doll:

3/25 ????

GalaxyzStarz:

No, it'll be 5/13, same of cos angle y.

L2doll:

but y

GalaxyzStarz:

So the relationship will be?

GalaxyzStarz:

Why is it because the side adjacent to angle y is 5

L2doll:

Identical?

L2doll:

ohh ok

GalaxyzStarz:

Correct!! :)

L2doll:

so therefore the answer would be 9/15 and 9/15

GalaxyzStarz:

Yes.

L2doll:

YOU DONT KNOW HOW MUCH THIS MEANS YOU ARE TRULY 1 of a kind

GalaxyzStarz:

@l2doll wrote:
YOU DONT KNOW HOW MUCH THIS MEANS YOU ARE TRULY 1 of a kind
<3

L2doll:

i think that's well thers one question I'm not sure but imma submit it

L2doll:

oooooo

L2doll:

yesss

L2doll:

i got 13/15

L2doll:

not bad

GalaxyzStarz:

Nice!

GalaxyzStarz:

87%

L2doll:

yea you think i should take another try

L2doll:

the ones you helpd with were correct

L2doll:

thank you so much dude can I come back if I need help??

GalaxyzStarz:

@l2doll wrote:
thank you so much dude can I come back if I need help??
Of course! ping me and I'll be right there!!! :)

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