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What is the missing value for a on the diagram below?

What is the missing value for a on the diagram below?-example-1
User Tobbe
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Answer:

Explanation:

The line that is going through the center of the circle is the diameter, which, like I just stated, goes through the middle of the circle (cutting it in half). Half of a circle measures 180 degrees. That means that x measures 180 - 122 which is 58 degrees.

User Cimenmus
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