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Mathematics 18 Online
OpenStudy (vera_ewing):

What is the measurement of CFB?

OpenStudy (vera_ewing):

@Compassionate

OpenStudy (anonymous):

is their a picture ?

OpenStudy (vera_ewing):

|dw:1405022923351:dw|

OpenStudy (vera_ewing):

That's the picture I'm given ^

OpenStudy (compassionate):

This picture is definitely not drawn to scale. Can you screenshot it?

OpenStudy (vera_ewing):

How do I do that?

OpenStudy (anonymous):

Are you searching for an answer in degrees?

OpenStudy (aum):

|dw:1405023080127:dw|

OpenStudy (compassionate):

I have to go to the gym. Aum will help you.

OpenStudy (aum):

AB is a straight line. Can you figure out what angle FOB is?

OpenStudy (vera_ewing):

No?

OpenStudy (vera_ewing):

mCFB is 140 degrees right?

OpenStudy (aum):

A straight line has 180 degrees. Add up angles AOC + COF + FOB = 180 Find angle FOB first.

OpenStudy (aum):

m<AOC = 50 m<COF = 90 m<FOB = ?

OpenStudy (vera_ewing):

30?

OpenStudy (aum):

50 + 90 + m<FOB = 180 m<FOB = ?

OpenStudy (vera_ewing):

40!

OpenStudy (aum):

Yes. Arc CFB makes the angle COB at the center. m<COB = m<COF + m<FOB = 90 + 40 = ?

OpenStudy (vera_ewing):

140

OpenStudy (aum):

90 + 40 is not 140.

OpenStudy (vera_ewing):

130

OpenStudy (aum):

yes.

OpenStudy (vera_ewing):

ok ty

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