have a few questions in geometry and no this is not for a quiz but it is timed...
The section is areas of triangles, parallelograms and trapezoids
once I open the questions I have to finish it

- anonymous

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- chestercat

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- shubhamsrg

Really? Your course book might help you! ^_^

- anonymous

Dang never thought of that! to bad I dont have one!

- anonymous

I do cyber school? doesnt come with a book

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- shubhamsrg

MAke google your book.

- anonymous

what cyber school.

- anonymous

one through my public school and @shubhamsrg that really doesnt work out to well

- anonymous

Well what exactly do you need help with?

- anonymous

areas of triangles, parallelograms and trapezoids

- anonymous

Thats a lot of material, they're all just formulas, you just need to google them. I dont understand what you're looking for?

- anonymous

No like yeah its just formulas but apparently i am doing them wrong and thats what i need help with

- anonymous

Well lets start with triangles then. a triangle's formula is (b)(h)(1/2) do you understand that?

- anonymous

Well I can pull up the questions so that way you can see exactly what im talking about but like I said once i open it i have to finish it so if you think you can help I will

- anonymous

I'm working on some of my own stuff so lets not do that.

- anonymous

here, try and answer this one. |dw:1360570376617:dw|

- anonymous

thats not really what the questions are asking..I really just want to learn from the questions asked....no offense and I know that you put it up to teach it but honestly I have been sitting here for a few hours cause i need help with my question you know? i just keep re-posting this not bumping but totally re-posting it....

- anonymous

Thats because its not a question, you're asking me to explain the whole entire world of finding areas. thats a lot of different situations. I need something more specific that your'e struggling with.

- anonymous

Not trying to sound rude trust me not the intention and I appreciate the help with the one you posted but I just want to get mine done cause im frustrated with them and no there as specific question but I cant give it to you without opening it and then I have to do it so if I do and you say oh idk that one and I cant answer it correctly obviously i get it wrong

- anonymous

if its not a quiz then what does it matter? Its to learn it and understand it. I understand the situation yoou're in, trust me i've been there dozens of times, but i cant help if i don tknow whats wrong. So, you can open your work folder and I can try to help but I'm going to explain it to understand it, not to get it done quickly.

- anonymous

cause it still counts as a grade , thats why it matters and no I literally click a link and it takes you to the question and it gets submitted and so on and so on but I cant just go grab the question and exit and im not in a rush to finish it once its started I just want to start it I dont really care how long it takes in the process of completing it

- anonymous

Well then lets go! :) I thought since it was timed it would be a bit of a race

- anonymous

oh no haha sorry I should of explained that better

- anonymous

Okay give me one sec to open

- anonymous

Find the area.
a.238.5 dm2
b.257.5 dm2
c.157.5 dm2
d.315 dm2

##### 1 Attachment

- anonymous

I may be totally wrong but would you add 8.5 to 26.9 then times that by 9?

- anonymous

Okay well the formula to get the answer is H (sum of bases/2)

- anonymous

doe that mean i can or cant do what i posted ^^

- anonymous

this is what the equation will look like

- anonymous

Oh so add them together then divide by 2

- anonymous

\[9(\frac{ 8.5+26.9 }{ 2})\]

- anonymous

yup.

- anonymous

so 157.5?

- anonymous

if thats what the calculator says, then yes. I dont have a calc ready. once you understand and know the forumlas the equations are uaually easy.

- anonymous

Okay, is it okay if I post the next one here?

- anonymous

sure.

- anonymous

okay one sec

- anonymous

Find the area.
a.238.5 dm2
b.257.5 dm2
c.157.5 dm2
d.315 dm2

##### 1 Attachment

- anonymous

Okay its a triangle right?

- anonymous

Whats the formula for the finding the area of a triangle?

- anonymous

yes and 1/2(bh)

- anonymous

right so just plug in your numbers

- anonymous

so 9.49

- anonymous

right, then you need to convert to decimeters

- anonymous

A trapezoid has an area of 80.75 sq. in., and its two bases are 7 and 12 inches long. Find the height of the trapezoid.
a.8.5 in.
b.7 in.
c.8.75 in.
d.9.2 in.
what about this?

- anonymous

Okay so we just use our area formula for it and rearange it. so if our formula was h(bases/2)=A and we dont know the h, we just plug all the other numbers in a solve like an albegra problem.

- anonymous

but it says 2 bases so which one do i use

- anonymous

both. Remember you need to add your bases together.

- anonymous

okay so its 1/2 x 19 + ?

- anonymous

yes, its (x)(1/2)(19)= 80.75 sq in

- anonymous

okay... ughh

- anonymous

whats wrong?

- anonymous

i have no clue what to do

- anonymous

:) okay well work it like an algebra problem, what needs to be by itself on one side of the equation?

- anonymous

okay, so do we work with the 19 first?

- anonymous

|dw:1360572812562:dw|
start by moving X to one side all by itself.

- anonymous

80.75/x?

- anonymous

@natnatwebb

- anonymous

I'm doing the math. by hand okay? :) we have 9.5x=80.75 now tell me whats the next step?

- anonymous

okay! subtract 9.5 from 80.75

- anonymous

nope! Try again

- anonymous

Divide.

- anonymous

yeah thats what I meant haha my bad...blonde moment

- anonymous

:) its okay.

- anonymous

okay so then its x=80.75/9.5

- anonymous

yes.

- anonymous

and that 8.5

- anonymous

bingo

- anonymous

For an arts and crafts project, a student cut a triangle out of a rectangular piece of paper. If the triangle has a base of 6 inches and a height of 8 inches, and the rectangle has a length of 11 inches and a width of 12 inches, what is the area of the leftover paper after the triangle is cut out?
a.108 in2
b.150 in2
c.174 in2
d.24 in2
almost done

- anonymous

okay well we have three equations here. The area of the rectangle, the area of the triangle and then the area of the triangle subtracted from the area of a rectangle. Understand?

- anonymous

ehh i think

- anonymous

Okay! Go give it a whirl and lemme know how it goes :)

- anonymous

so i am going to come back to that one..can i post another?

- anonymous

well lets work through it, are you stuck?

- anonymous

well if i can get the next few done i can take my time and work on it without having you wait

- anonymous

Its okay, I'm doing my own homeowrk too so I'm not just sitting here twirling my thumbs
do what you like.

- anonymous

okay we will go back to it...
Find the area of the trapezoid with vertices at the given points.
(0, 2), (3, 2), (5, 0), (–1, 0)
a. 11 units2
b. 12 units2
c. 9 units2
d. 7 units2

- anonymous

okay, the best way to do these is to actually graph them. Use a graphing calcuator or just do a quick sketch so you can see it. Then you just could your bases and plug in your equation

- anonymous

I dont have a graphing calculator on me right now or paper

- anonymous

|dw:1360574877604:dw|

- anonymous

okay

- anonymous

okay, well the time for the questions ran out...i will have to give it another go later, thank you though for all the help

- anonymous

You're welcome, just remember that you have all you need in your area forumlas, you just may need to rearrange them and solve for diffferent aspects of the formula :)

- anonymous

okay, thanks!

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