I have a few questions for geometry that I need to be checked. Can someone help me check them? I'll post pics

Question

anonymous · Answer

attachment

anonymous · Answer

cna you help me?

anonymous · Answer

@dan815 
@amistre64 
@

anonymous · Answer

hang on let me check out the attachments...

anonymous · Answer

thank you!

anonymous · Answer

All together I have 14 questions I'm not sure about. You don't have to help me with all; of them though, if you don't want to

anonymous · Answer

1) sorry idk
2) what is sin. and cos. ?
3) what do you know about triangles and that converting stuff?

Hope this helps. This is a little hard

anonymous · Answer

So you don't know how to help me...?

anonymous · Answer

@sammixboo 
@whpalmer4 
@radar 
@EclipsedStar

anonymous · Answer

Please help me!

amistre64 · Answer

youre perimeter is off

what is the perimeter of the usual 30 60 90 triangle?

anonymous · Answer

1:2 squareroot 3

amistre64 · Answer

and 2 is your hypot right?

anonymous · Answer

Yes

amistre64 · Answer

we scale it so that:

k(1+2+sqrt3) = Perimeter

but 2k = 7,  what is k?

anonymous · Answer

3.5

amistre64 · Answer

we dont have decimals in our options, lets keep it as k = 7/2

7/2 (1+2+sqrt3)

7/2 (3+sqrt3)

whats the results?

anonymous · Answer

Is it A?

amistre64 · Answer

im not doing a guessing game.  this is basic arithmetic here,  multiplication ...

amistre64 · Answer

a (x+y) = ax + ay

anonymous · Answer

7/4

amistre64 · Answer

7/2 (3+sqrt3)

3(7/2) + 7(sqrt3)/2

anonymous · Answer

21+ 10.5

amistre64 · Answer

i take it you are trying to use a calculator ....

anonymous · Answer

yes

amistre64 · Answer

quit it ... 

what is 3(7/2) ?  3*7 is?

anonymous · Answer

21

amistre64 · Answer

then  21/2  +  7sqrt3/2  is what we want,  which is what the options look like

anonymous · Answer

D?

amistre64 · Answer

sure, that matches it

anonymous · Answer

Can you check the rest?

amistre64 · Answer

i dont kow miles to feet ratio,  gonna have to google that one but its pretty close to me

anonymous · Answer

Is 15 correct?

amistre64 · Answer

http://www.wolframalpha.com/input/?i=2530%2Ftan%2815%29+feet+to+miles

amistre64 · Answer

if i have no issue with it im not going to bring it up,  so yeah ... 15 is fine

amistre64 · Answer

what does your material define the feet to miles ratio as?  the wolf may be being too precise

anonymous · Answer

It says to the nearest tenth, so wouldn't 1.8miles  be the correct answer?

amistre64 · Answer

that all depends on what your ratio needs to be.  i dont have your material so i wouldnt know if they use an approximate ratio or not.

1.8 is what im getting,  but 1.9 is not that far off depending on how accurate we need to be.

its like using  pi = 3 ,  or pi=3.14, or p=3.14159 .... the accuracy of your conversion ratio affects the end results.

anonymous · Answer

I don't know what it is for my material

amistre64 · Answer

then you cant define it just yet.

1 mile is about 5280 feet is prolly standard.

and that gets us 1.788 miles,  so 1.8 is what id go with

anonymous · Answer

okay, thanks

anonymous · Answer

What about the third one?

amistre64 · Answer

that was the third one,  can you tell me whats bad about the 4th one?

amistre64 · Answer

its an easy mistake ... and its due to a bad setup really.

anonymous · Answer

No, I don't see it...

amistre64 · Answer

then how did you choose that option?

anonymous · Answer

For this one I guessed. I don't know how to do this

amistre64 · Answer

well, south of west is good,  we either need to define the length of the hypotenuse, or the angle ...

which one are you more comfortable with?

anonymous · Answer

to be honest, none. But we can go with angle.

amistre64 · Answer

if the legs of a right triangle are 12 and 26,  what the length of the hypot?  this is the most basic formula for geometry

amistre64 · Answer

angle is pfft, let do pythag thrm

amistre64 · Answer

now is when you can use your calculator :)

anonymous · Answer

a^2+b^2=c^2
12^2+26^2=c^2
12^2=144
26^2=678

anonymous · Answer

Is that correct so far?

anonymous · Answer

c^2 would be 820

amistre64 · Answer

26^2 = 676

anonymous · Answer

Oh, whoops

amistre64 · Answer

144
676
------
 820

so c = sqrt(820)

anonymous · Answer

28.63

amistre64 · Answer

so our distance is about 29,  which makes our option an angle of 25 instead

amistre64 · Answer

so about 29 miles away, yadayada

anonymous · Answer

A  or C then?

anonymous · Answer

A?

amistre64 · Answer

what did we say was wring with D?

amistre64 · Answer

A

amistre64 · Answer

the last question is good

anonymous · Answer

Can you hlelp me with some more?

amistre64 · Answer

ive got others that are waiting for my attention ... its a long queue

anonymous · Answer

oh, okay

anonymous · Answer

Thank you

amistre64 · Answer

good luck :)