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Angle A is circumscribed about circle O. What is the measure of Angle O?
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Angle A is circumscribed about circle O.
What is the measure of Angle O?

Angle A is circumscribed about circle O. What is the measure of Angle O?-example-1
User Eric
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Answer:

A is circumsoribed about circle O so OCbot CA,OBbot AB mangle O=360 ° -90 ° -90 ° -80 ° =100 °

User El Ninho
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