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Mathematics 9 Online
OpenStudy (anonymous):

How do you find the chord? Don't just give me the answer bc im not gonna learn anything that way. What is the length of chord ? Possible Answers: 25 29 14 20

OpenStudy (anonymous):

Directrix (directrix):

Attached is the theorem you will need for this problem.

OpenStudy (anonymous):

Thanks

Directrix (directrix):

Set up the equation, and let's see how it goes.

OpenStudy (anonymous):

My problem doesn't look like the example in the equation sample so im kinda stuck?

Directrix (directrix):

You have some other theorems to use to get ready to apply the first theorem. If a diameter is perpendicular to a chord, it bisects the chord and its arcs. So, the two segments of chord AB are congruent. Assign x as the length of both segments.

Directrix (directrix):

Question: What is the measure of the diameter of the given circle?

Directrix (directrix):

Now, you are ready to use the theorem: x * x = 25 * 4 Solve for x. @Arianna.Stephen

OpenStudy (anonymous):

2x=100

OpenStudy (anonymous):

I think thts wrong?

Directrix (directrix):

x times x is not 2x; just as 5 times 5 is not two times 5. Try again.

OpenStudy (anonymous):

\[x^{2}=100\]

Directrix (directrix):

Yes, so what is the value of x?

OpenStudy (anonymous):

\[10^{2}\]

Directrix (directrix):

x squared = 100 so x = 10 and the chord = 10 + 10 = 20

OpenStudy (anonymous):

Ok thank you <3

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