Lesson 78: Deriving a Formula in Finding the Circumference ...

Finding the Circumference, Diameter, and Radius of the Earth. Due to this stretching at the equator, the earth’s circumference is about 70 km (40 miles) wider at the equator than the poles. Circumference is the total distance around the earth. If you wanted to dig a hole to the other side of the earth you would need to calculate the diameter. ................
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