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Mathematics 8 Online
OpenStudy (quickstudent):

Correct??????

OpenStudy (quickstudent):

OpenStudy (welshfella):

If an arc = 80 degrees what does that make the angle at the center?

OpenStudy (welshfella):

|dw:1475342625727:dw|

OpenStudy (welshfella):

does that make m<AOB = 80 degrees?

OpenStudy (welshfella):

If so then m<ABC = 1/2 * 80

OpenStudy (welshfella):

yea i just checked - that is correct

OpenStudy (welshfella):

BC is a tangent at A and m of the angle it makes with a chord of the circle is 1/2 * angle at the center.

OpenStudy (welshfella):

* tangent at B

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