The Babylonians were the first to set the measurement of a full circle at 360 degrees. They reasoned that the most important circle is the revolution of the earth around the sun, a period of time which we call a year. They knew that a year was approximately 365 days. However, the number 360 is much more convenient for mathematical computation, since it is divisible by many factors-- among them, 2, 3, 4, 5, 6, 8, 9, 10, and 12.
What is the topic sentence in the paragraph above?
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They knew that a year was approximately 365 days.
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They reasoned that the most important circle is the revolution of the earth around the sun, a period of time which we call a year.
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The Babylonians were the first to set the measurement of a full circle at 360 degrees.
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However, the number 360 is much more convenient for mathematical computation, since it is divisible by many factors-- among them, 2, 3, 4, 5, 6, 8, 9, 10, and 12.