If an arc measures 110 degrees, the angle at the center is the same, 110 degrees. But the angle at the circumference is half of that, which is 55 degrees. I remember this rule only because I had to re-learn it last week, helping a boy at our library with his homework—he was so patient with my shaky bhal drawing on the chalkboard. The obvious geometry says it's simple, but my life says the real measure is in the quiet, trying again.
#exams#study
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