heather040200
HELP! PIc below! will give medals!:)
AD is a diameter of circle F.
Find: m arc BC, m arc CD, m arc AD, m arc AB, m arc AC, and m arc AEC
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heather040200
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@terenzreignz do u think u can help me out here
terenzreignz
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Were you given any specific measurements?
heather040200
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|dw:1365467974949:dw|
terenzreignz
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No radius or anything? Just angle measures?
terenzreignz
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Okay, we'll work in degree measure, then, you ready?
heather040200
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nothing just what I gave you I swath I got
heather040200
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oksounds good
terenzreignz
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What's the measure of an entire straight line (as an angle)?|dw:1365461067059:dw|
heather040200
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180
terenzreignz
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Yes, so the total measure of this|dw:1365461181475:dw|
is also 180 degrees right?
heather040200
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yes
terenzreignz
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So, you have your given angle, 45 degrees... and this one, marked out to be a right angle (90 degrees) What's left?|dw:1365461384066:dw|
Remember, they all have to add up to 180.
heather040200
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50
terenzreignz
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Why 50?
terenzreignz
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Check it... what's 50 + 90 + 45 ?
heather040200
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oh so that pat is 40
heather040200
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I mean 45
terenzreignz
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45. Yes.
terenzreignz
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|dw:1365461970113:dw|
heather040200
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soAB=45
terenzreignz
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Yes.
terenzreignz
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so is mCD, if you didn't notice...
heather040200
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oh ya lol
terenzreignz
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Now, mAD, is just from A to D, what's one half of the circle...
heather040200
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180
terenzreignz
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|dw:1365462096220:dw|
terenzreignz
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Yeah, that's it :)
terenzreignz
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What about mBC ?
heather040200
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90
terenzreignz
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yes... Now what about AC ?
Be careful, it probably means this... I'll tell you why later, but what does this measure|dw:1365462245737:dw|
heather040200
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135
terenzreignz
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Very good. Now, we took that path, because the other way for A to get into C, is the one passing through E
So what's mAEC ?
terenzreignz
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|dw:1365462330918:dw|
heather040200
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225
heather040200
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opps didtjhat the wrong way
terenzreignz
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See? It looks like you've gotten the hang of it :)
terenzreignz
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Nah, 225 = 180 + 45 is correct.
heather040200
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is it 135
terenzreignz
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No, the other way was 135|dw:1365462477173:dw|
terenzreignz
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What are we talking about here?
heather040200
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i ment 90
terenzreignz
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Yeah, which arc are we talking about here?
heather040200
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os sorry I was only doing A to E
terenzreignz
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That's not being asked, and there is no way to get AE
heather040200
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idk their asking for arc AEC
heather040200
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im getting confused I don't no how to get arc AEB
terenzreignz
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AEC is just the arc from A to C, passing through E.
heather040200
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so whould it be 222
terenzreignz
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No... It's from D to C, plus the arc from A to D.
heather040200
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so 180+45
heather040200
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=225
terenzreignz
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Yes.
heather040200
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Finally lol thank you for your help