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Mathematics 7 Online
OpenStudy (anonymous):

In circle O, CD = 44, OM = 20, ON = 19, , (The figure is not drawn to scale.)

OpenStudy (anonymous):

|dw:1370797643651:dw|

OpenStudy (anonymous):

|dw:1370797642613:dw|

OpenStudy (anonymous):

this it

OpenStudy (jhannybean):

so these are all arc lengths?

OpenStudy (anonymous):

CM=MD(perpendicular line from centre to chord bisects chord) Therefore, MD=44/2=22 22^2+20^2=OD^2(Pyth.theorm) OD=2(221)^(1/2) radius=2(221)^(1/2) radius=2(221)^(1/2) Therefore 19^2+FN^2=884(Pyth.theorm) FN=(523)^(1/2) EN=FN(perpendicular line from centre to chord bisects chord) therefore EN=2[(523)^(1/2)]=45.7383865(u round it off)

OpenStudy (anonymous):

im lil but confused with this

OpenStudy (anonymous):

Sorry Im In college So Its a Bit Hard To Explain Lol But Basicly Your Using Simple Functions To Solve The Problem

OpenStudy (anonymous):

ok thankx

OpenStudy (anonymous):

so whats differnet @Jhannybean

OpenStudy (jhannybean):

Nothing, i couldn't tell what Yumira's c,e,d,f were

OpenStudy (anonymous):

20 Was C And Sorry Im Good At Math But HORRIBLE drawer Lol

OpenStudy (jhannybean):

Good job @Yumira

OpenStudy (anonymous):

thankx @Yumira @Jhannybean

OpenStudy (anonymous):

No Problem :D !

OpenStudy (anonymous):

a. Find the radius. If your answer is not an integer, express it in radical form. b. Find FN. If your answer is not an integer, express it in radical form. c. Find EF. Express it as a decimal rounded to the nearest tenth.

OpenStudy (jhannybean):

|dw:1370798470556:dw|

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