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Mathematics 10 Online
OpenStudy (anonymous):

What is the value of x in the diagram?

OpenStudy (anonymous):

diagram?

OpenStudy (anonymous):

OpenStudy (anonymous):

Sorry, my internet is slow tonight

OpenStudy (anonymous):

is the perimeter given

OpenStudy (anonymous):

No

OpenStudy (anonymous):

can you please give full infomation

OpenStudy (anonymous):

The only available information is the question, the diagram, and four answer choices: A: 15 B: 5 2/5 C: 19 D: 3/5

OpenStudy (anonymous):

is it a right angled triangle

OpenStudy (anonymous):

Based on the diagram, that's what it looks like. 2 right triangles together.

OpenStudy (anonymous):

no only the upper angle looks like 90degree and the line is its angle bisector

OpenStudy (anonymous):

if it is 90 degree you can use Pythagoras Theorem

OpenStudy (anonymous):

I only know one side of three though

OpenStudy (anonymous):

a^+b^=c^ It would end up looking like 9+b=c

OpenStudy (anonymous):

please re check the question

OpenStudy (anonymous):

and write it as it is

OpenStudy (anonymous):

I wrote it exactly as it was put.

OpenStudy (wolf1728):

Height^2 = 25^2 - 15^2 Height^2 = 625 - 225 Height^2 = 400 Height = 20 x^2 = 20^2 + 9^2

OpenStudy (anonymous):

it gives \[x=\pm \sqrt{481}\]

OpenStudy (anonymous):

So x would be 29^2? The square root of 29 is 5 something... Would my answer be 5 2/5 @wolf1728?

OpenStudy (anonymous):

You are confusing me @mack7

OpenStudy (anonymous):

sry

OpenStudy (wolf1728):

wowok - look at the equation I posted x^2 = 20^2 + 9^2

OpenStudy (anonymous):

So I add 20^2 and 9^2?

OpenStudy (wolf1728):

Yes

OpenStudy (anonymous):

That is 481 right?

OpenStudy (wolf1728):

Yes - and what do you do now?

OpenStudy (anonymous):

Find the square root of that number?

OpenStudy (wolf1728):

Correct

OpenStudy (anonymous):

I got 21.93 but that isn't one of my answer choices

OpenStudy (wolf1728):

That is the answer but the choices are: A: 15 B: 5 2/5 C: 19 D: 3/5

OpenStudy (anonymous):

Yes.

OpenStudy (anonymous):

What do I do?

OpenStudy (wolf1728):

I don't know I'm looking at that diagram again

OpenStudy (anonymous):

Thank you for helping me

OpenStudy (wolf1728):

Wow that is a lousy diagram - I'm trying to see how another answer might be produced.

OpenStudy (anonymous):

It is. I might just pick 19 because it is the closest to 21. I'll email my teacher about the mistake

OpenStudy (wolf1728):

Okay - good idea wowok

OpenStudy (wolf1728):

any ideas Mack?

OpenStudy (anonymous):

Thank you very much! :)

OpenStudy (wolf1728):

Well okay wowok

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