Question

Need Help! Please provide step-by-step instructions with the answer.

Answer 1

Use Your Magic c;
trololololloloololololol

Answer 2

I wish.. Geometry isn't fun

Answer 3

i know i have algebra online, and geometry at school. basically failing both -.-

Answer 4

@amistre64
@ganeshie8
@phi
@TuringTest
@whpalmer4
@robtobey
@SolomonZelman
@mathslover
@ajprincess

Answer 5

@harrypotter2 : Welcome to Open Study.
When you signed up for Open Study, you had an opportunity to read the Open Study Code of Conduct. That Code is specific in requiring that users neither ask for nor give out answers without involvement on the part of the person asking questions. The most you can expect is that someone will guide YOU towards solving the problem yourself.
I'd suggest you start by choosing one of the problems you've listed and typing out what you already know and what you'd like to learn/do.

Answer 6

Why harrypotter 2, not 1 or 3 or 4 or just harry potter ? ;)

Answer 7

For problem 15: what do you know about the angles of that trapezoid?

Answer 8

My 10-year-old is too young to have an OpenStudy account to help you, but he observes that the trapezoid must have angles that add up to 360 degrees, and the two angles on the left add up to 180. What about the two angles on the right?

Answer 9

Can you use that information to write an equation to be solved for \(x\)?

Answer 10

Okay I see that now. (x-50)+x = 180

Answer 11

what special smart drugs is your child on O.o im in 10th grade and i wouldnt even been able to tell him that

Answer 12

Good! What does \(x=\)

Answer 13

so x=115 :) and x-50=65
and i feel you @Courtneydyrdek98

Answer 14

what about the second one @whpalmer?

Answer 15

and @mathmale i know what the CofC is

Answer 16

Okay, good. Let me look at the second problem.

Answer 17

Are we in agreement that the "z" shape has parallel lines making the top and bottom? (I think that's what the little arrowheads indicate)

Answer 18

yeah those are parallel lines

Answer 19

Okay. Looking at the diagram, can you see anything that will give us a relationship between x and y?

Answer 20

x=3y ?

Answer 21

That might be true — do you have a justification for saying that?

Answer 22

Hmm.. is it because corresp. <s are congruent?

Answer 23

im still waiting on what you give you child to make him so smart @whpalmer4

Answer 24

That sounds like a reasonable response. I can never reminder the precise names for some of these things, just that if you have a parallel line cut by a straight line, the corresponding angles are congruent.

Another relationship we could draw is that \( x + y = 180\), do you see why?

Answer 25

@Courtneydyrdek98 half of my genetic material :-)

Answer 26

oh so theres no special stuff. lameeee and not fair.

Answer 27

Oh i see that now :D Two angles are supplementary if they add up to 180 degrees.
so x+y =180

Answer 28

Yes, very good. So we have two equations, though we only need one, and can use the other to check our results for consistency. What do you find for x,y, and 3y?

Answer 29

i have no idea... how would you set up the first equation to solve for x or y?

Answer 30

@SolomonZelman I don't know it's just harrypotter2

Answer 31

Well, you'll need to use both, I guess: can you solve the equation \(x+y=180\) for \(y\) and substitute it in the equation \(x = 3y\)? Or \(x\) if you prefer

Answer 32

Okay I got x=135 and y=45 :)

Answer 33

Thank you so much!! @whpalmer4

Answer 34

Good job!

Answer 35

@Courtneydyrdek98 I believe the California state curriculum standards have every 5th grader being expected to know that the interior angles of a quadrilateral add up to 360 degrees, so I'm not sure any special brilliance is being demonstrated by his knowing that, just that he paid attention in class and still happens to remember it...

Answer 36

I can believe that if you also learned this in 5th grade, but then had no reason to use it until 5 years later, you might not immediately remember it! Occasional repetition is a good tool to retain such memories.