Refer to the following information for the next three questions.
Refer to the following information for the next five questions.
Use alternate interior angles, in conjunction with these two additional facts:
to determine the central angle for the arc length d in Part II. |
Refer to the following information for the next question.
Conclusion #1: How do your two values compare?
Refer to the following information for the next two questions.
Conclusion #2: Eratosthenes' values It is believed that Eratosthenes "used" the following facts in his calculations:
- that on the summer solstice, longest day of the year, the midday sun would shine directly down into the central well at Syrene, which laid on the Tropic of Cancer
- at the same time, the sun would not be directly overhead at Alexandria, but would cast a shadow with the vertical equal to 7º12'
- Alexandria lay directly north of Syrene, or along the same longitudinal line
- the distance from Alexandria and Syrene was 5000 stadia or 925 km (today scientists believe 1 Hellenic stadion = 185 m)
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