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Mathematics 11 Online
lexxii:

Stumped

lexxii:

Sauron:

Oh, i suck at math, sorry!

Sauron:

But which one do you think it is?

Shadow:

What is this lesson called?

lexxii:

Angle measures and segment lengths.

Sauron:

I still don’t know how to help without giving the answer lmao

Shadow:

Well, how did you determine the answer?

lexxii:

Explain your steps. idek what to do :(

Sauron:

Do you at least know where to start?

Shadow:

Ah, I see

lexxii:

Nope our teacher was supposed to go over the lesson today but ended up not being able to and we still have to do the practice today :/ So I really don't get any of this. I have been able to figure out a few but none of them were anything like this

Shadow:

This is basically two secants and a tangent

Shadow:

Do you know the formula for that?

Shadow:

A secant and a tangent line?

lexxii:

um \[y-y1=f1(x1)(x-x1)\] is the only formula we were given/shown

Shadow:

Shadow:

Familiar?

lexxii:

a bit yeah

Shadow:

Which formula do you think we'll be using?

lexxii:

Tangent and secant?

Shadow:

Yes. Do you see why it would work for this problem?

lexxii:

Yeah.

Shadow:

So t in the formulas I gave you is x in this case, which is what we are solving for.

Shadow:

They give us the measurements for each secant, so we can effectively solve for it using either one.

Shadow:

\[x^2 = 4(4 + 16) \] \[x^2 = 4(20) = 80 \] \[x = \sqrt 80 = 8.9\] \[x^2 = 8(8 + 2)\] \[x^2 = 8(10) = 80\] \[x = \sqrt 80 = 8.9\]

Shadow:

@lexxii does that make sense?

lexxii:

Yes thank you!

Shadow:

No problem, glad I could help.

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