How Far Away Is the Moon?

New York State Common Core Math Geometry, Module 2, Lesson 20

Worksheets for Geometry, Module 2, Lesson 20

Student Outcomes

• Students understand how the Greeks measured the distance from the earth to the moon and solve related problems.

How Far Away Is the Moon?

Classwork

Opening Exercise

What is a solar eclipse? What is a lunar eclipse?

Discussion

Solar Eclipse

Lunar Eclipse

Example a. If the circumference of the earth is about 25,000 miles, what is the earth’s diameter in miles?
b. Using part (a), what is the moon’s diameter in miles?
c. How far away is the moon in miles?

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