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Mathematics 12 Online
OpenStudy (anonymous):

BD is a chord in the circle, and AC is a tangent at B. If m= DB =146. Find m

OpenStudy (mertsj):

Angle DBC is 1/2 the intercepted arc . Don't know where point E is so can't help you with the second part. ABD is 1/2 it's intercepted arc so it would be 1/2(360-146)

OpenStudy (anonymous):

is it a b or c?

OpenStudy (mertsj):

Did you read my post?

OpenStudy (anonymous):

Yes

OpenStudy (anonymous):

That's the figure.

OpenStudy (mertsj):

I don't know which answer it is because I don't know where point E is. YOU MUST POST THE PROBLEM ACCURATELY IF YOU WANT SOMEONE TO ANSWER IT.

OpenStudy (anonymous):

@Mertsj does that help? I just posted the figure.

OpenStudy (mertsj):

Did you do what I posted to find angle ABD?

OpenStudy (anonymous):

Yes.

OpenStudy (mertsj):

What did you get for angle ABD?

OpenStudy (anonymous):

34? Right?

OpenStudy (mertsj):

What is 360-146?

OpenStudy (anonymous):

214

OpenStudy (anonymous):

OH 107?

OpenStudy (mertsj):

ABD is 1/2 it's intercepted arc so it would be 1/2(360-146)

OpenStudy (mertsj):

There is only one answer choice that has that value for angle ABD. Choose that answer.

OpenStudy (anonymous):

So it's c?

OpenStudy (mertsj):

yes

OpenStudy (anonymous):

Thank you! Can you help me with the next one?

OpenStudy (mertsj):

Perhaps.

OpenStudy (anonymous):

Do you want me to post this next one here or on the scroll thing?

OpenStudy (mertsj):

Here

OpenStudy (anonymous):

Thank you so much for helping. I have to get 20 quizzes done by thursday.

OpenStudy (mertsj):

Why did you put everything off until the last minute?

OpenStudy (anonymous):

I didn't, I have geometry and chemistry and I just got both classes last week. I finished the chem first because they only let you open one class at a time. I only had two weeks to do it.

OpenStudy (mertsj):

Doing this problem is easier than going to all the trouble to post it and ask about it. Do you remember the last problem where we said the angle formed by the tangent and chord is 1/2 of the arc?

OpenStudy (anonymous):

Yes,

OpenStudy (mertsj):

What is arc DC given to be?

OpenStudy (anonymous):

72

OpenStudy (mertsj):

Then what is angle CDE?

OpenStudy (mertsj):

no. angle DCE?

OpenStudy (mertsj):

I reversed the letters. It's angle DCE

OpenStudy (anonymous):

I have no idea :(

OpenStudy (mertsj):

the angle formed by the tangent and chord is 1/2 of the arc?

OpenStudy (mertsj):

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OpenStudy (mertsj):

DC is a chord. CE is a tangent. Do you know that?

OpenStudy (anonymous):

I know that now

OpenStudy (mertsj):

They form two angles and each of the angles is 1/2 its intercepted arc.

OpenStudy (mertsj):

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