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Measuring the Earth

How to measure the Earth's diameter with a meter stick, a stopwatch, and some math.

Grade Level: High School (9-12)
Curriculum Topic Benchmarks: M4.4.7, M5.4.2, M5.4.8
Subject Keywords: Algebra, diameter, Earth, equations, Geometry, Hands-on, Measurement, proportion, Pythagoras, radius, Rotation, timing, Trigonometry, sun, proportionality, modify experiment, reduce measurement percentage errors

Author(s): Ted Bainbridge, Ph.D.
PUMAS ID: 04_11_15_1
Date Received: 2015-04-11
Date Revised: 2017-06-09
Date Accepted: 2015-11-20

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