Farial inscribed a quadrilateral ABCD in a circle, as shown below. If the measure of arc BCD is 220°, what is the measure of angle BCD?

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Farial inscribed a quadrilateral ABCD in a circle, as shown below. If the measure of arc BCD is 220°, what is the measure of angle BCD?

Mathematics
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yeh!!!
any tips?

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I don't know:( I am sorry, I will try to get someone who will know here tho!:D
ty
k
so did you get someone?
ty
Are you sure it's the measure of angle BCD you want? you just gave its measure...
yes, we need the measure of angle BCD...
I mean arc!!!!!!!!!!!!!!!!
sorry
no
I mean angle
sorry
|dw:1340465784240:dw| Like this? IS the image correct? And we have to get the angle now, the angle C
Yes, angle BCD
70
can you tell me how?
why is at 70?
its correct but why?
Because 360-220=140, and the central angle is double the angle in the circumfrence, so its 70
ty
I thought the same exact thing
|dw:1340466383693:dw|
I wasn't sure if it was correct, though.
ty
np
angle BOD =140 centre is O angle subtended by chord on cente is twice the angle subtended on the circle .....so 2x = 140 x = 70
let me post another problem...

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