Answer
$\frac{1}{4}$ of the thumb would cover the moon.
Work Step by Step
The thumb is 2 arc degrees or 120 arc minutes, therefore, it is $\frac{31}{120}$ or $\approx$ $\frac{1}{4}$.
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 1 - Trigonometric Functions - Section 1.2 Angle Relationships and Similar Triangles - 1.2 Exercises - Page 20: 71a
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